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[PATCH v34 03/11] Allow to prolong life span of transition tables until transaction end
391+ messages / 5 participants
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* [PATCH v34 03/11] Allow to prolong life span of transition tables until transaction end
@ 2019-12-20 01:09 Yugo Nagata <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Yugo Nagata @ 2019-12-20 01:09 UTC (permalink / raw)

Originally, tuplestores of AFTER trigger's transition tables were
freed for each query depth. For our IVM implementation, we would like
to prolong life of the tuplestores because we have to preserve them
for a whole query assuming that some base tables might be changed
in some trigger functions.
---
 src/backend/commands/trigger.c | 83 ++++++++++++++++++++++++++++++++--
 src/include/commands/trigger.h |  2 +
 2 files changed, 81 insertions(+), 4 deletions(-)

diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c
index 170360edda..0e1b3faed7 100644
--- a/src/backend/commands/trigger.c
+++ b/src/backend/commands/trigger.c
@@ -3754,6 +3754,10 @@ typedef struct AfterTriggerEventList
  * end of the list, so it is relatively easy to discard them.  The event
  * list chunks themselves are stored in event_cxt.
  *
+ * prolonged_tuplestored is a list of transition table tuplestores whose
+ * life are prolonged to the end of the outmost query instead of each nested
+ * query.
+ *
  * query_depth is the current depth of nested AfterTriggerBeginQuery calls
  * (-1 when the stack is empty).
  *
@@ -3819,6 +3823,7 @@ typedef struct AfterTriggersData
 	SetConstraintState state;	/* the active S C state */
 	AfterTriggerEventList events;	/* deferred-event list */
 	MemoryContext event_cxt;	/* memory context for events, if any */
+	List   *prolonged_tuplestores;	/* list of prolonged tuplestores */
 
 	/* per-query-level data: */
 	AfterTriggersQueryData *query_stack;	/* array of structs shown below */
@@ -3854,6 +3859,7 @@ struct AfterTriggersTableData
 	bool		closed;			/* true when no longer OK to add tuples */
 	bool		before_trig_done;	/* did we already queue BS triggers? */
 	bool		after_trig_done;	/* did we already queue AS triggers? */
+	bool		prolonged;			/* are transition tables prolonged? */
 	AfterTriggerEventList after_trig_events;	/* if so, saved list pointer */
 
 	/*
@@ -3903,6 +3909,7 @@ static void TransitionTableAddTuple(EState *estate,
 									TupleTableSlot *original_insert_tuple,
 									Tuplestorestate *tuplestore);
 static void AfterTriggerFreeQuery(AfterTriggersQueryData *qs);
+static void release_or_prolong_tuplestore(Tuplestorestate *ts, bool prolonged);
 static SetConstraintState SetConstraintStateCreate(int numalloc);
 static SetConstraintState SetConstraintStateCopy(SetConstraintState origstate);
 static SetConstraintState SetConstraintStateAddItem(SetConstraintState state,
@@ -4782,6 +4789,45 @@ afterTriggerInvokeEvents(AfterTriggerEventList *events,
 }
 
 
+/*
+ * SetTransitionTablePreserved
+ *
+ * Prolong lifespan of transition tables corresponding specified relid and
+ * command type to the end of the outmost query instead of each nested query.
+ * This enables to use nested AFTER trigger's transition tables from outer
+ * query's triggers.  Currently, only immediate incremental view maintenance
+ * uses this.
+ */
+void
+SetTransitionTablePreserved(Oid relid, CmdType cmdType)
+{
+	AfterTriggersTableData *table;
+	AfterTriggersQueryData *qs;
+	bool		found = false;
+	ListCell   *lc;
+
+	/* Check state, like AfterTriggerSaveEvent. */
+	if (afterTriggers.query_depth < 0)
+		elog(ERROR, "SetTransitionTablePreserved() called outside of query");
+
+	qs = &afterTriggers.query_stack[afterTriggers.query_depth];
+
+	foreach(lc, qs->tables)
+	{
+		table = (AfterTriggersTableData *) lfirst(lc);
+		if (table->relid == relid && table->cmdType == cmdType &&
+			table->closed)
+		{
+			table->prolonged = true;
+			found = true;
+		}
+	}
+
+	if (!found)
+		elog(ERROR,"could not find table with OID %d and command type %d", relid, cmdType);
+}
+
+
 /*
  * GetAfterTriggersTableData
  *
@@ -4992,6 +5038,7 @@ AfterTriggerBeginXact(void)
 	 */
 	afterTriggers.firing_counter = (CommandId) 1;	/* mustn't be 0 */
 	afterTriggers.query_depth = -1;
+	afterTriggers.prolonged_tuplestores = NIL;
 
 	/*
 	 * Verify that there is no leftover state remaining.  If these assertions
@@ -5152,19 +5199,19 @@ AfterTriggerFreeQuery(AfterTriggersQueryData *qs)
 		ts = table->old_upd_tuplestore;
 		table->old_upd_tuplestore = NULL;
 		if (ts)
-			tuplestore_end(ts);
+			release_or_prolong_tuplestore(ts, table->prolonged);
 		ts = table->new_upd_tuplestore;
 		table->new_upd_tuplestore = NULL;
 		if (ts)
-			tuplestore_end(ts);
+			release_or_prolong_tuplestore(ts, table->prolonged);
 		ts = table->old_del_tuplestore;
 		table->old_del_tuplestore = NULL;
 		if (ts)
-			tuplestore_end(ts);
+			release_or_prolong_tuplestore(ts, table->prolonged);
 		ts = table->new_ins_tuplestore;
 		table->new_ins_tuplestore = NULL;
 		if (ts)
-			tuplestore_end(ts);
+			release_or_prolong_tuplestore(ts, table->prolonged);
 		if (table->storeslot)
 		{
 			TupleTableSlot *slot = table->storeslot;
@@ -5181,6 +5228,34 @@ AfterTriggerFreeQuery(AfterTriggersQueryData *qs)
 	 */
 	qs->tables = NIL;
 	list_free_deep(tables);
+
+	/* Release prolonged tuplestores at the end of the outmost query */
+	if (afterTriggers.query_depth == 0)
+	{
+		foreach(lc, afterTriggers.prolonged_tuplestores)
+		{
+			ts = (Tuplestorestate *) lfirst(lc);
+			if (ts)
+				tuplestore_end(ts);
+		}
+		afterTriggers.prolonged_tuplestores = NIL;
+	}
+}
+
+/*
+ * Release the tuplestore, or append it to the prolonged tuplestores list.
+ */
+static void
+release_or_prolong_tuplestore(Tuplestorestate *ts, bool prolonged)
+{
+	if (prolonged && afterTriggers.query_depth > 0)
+	{
+		MemoryContext oldcxt = MemoryContextSwitchTo(CurTransactionContext);
+		afterTriggers.prolonged_tuplestores = lappend(afterTriggers.prolonged_tuplestores, ts);
+		MemoryContextSwitchTo(oldcxt);
+	}
+	else
+		tuplestore_end(ts);
 }
 
 
diff --git a/src/include/commands/trigger.h b/src/include/commands/trigger.h
index 8a5a9fe642..6718514d34 100644
--- a/src/include/commands/trigger.h
+++ b/src/include/commands/trigger.h
@@ -265,6 +265,8 @@ extern void AfterTriggerEndSubXact(bool isCommit);
 extern void AfterTriggerSetState(ConstraintsSetStmt *stmt);
 extern bool AfterTriggerPendingOnRel(Oid relid);
 
+extern void SetTransitionTablePreserved(Oid relid, CmdType cmdType);
+
 
 /*
  * in utils/adt/ri_triggers.c
-- 
2.34.1


--Multipart=_Thu__11_Jul_2024_13_23_57_+0900_hKsU2G3a3BgS2FFs--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.
---
 doc/src/sgml/config.sgml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..d645a50476f 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is a deprecated alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
-- 
2.53.0


--e4Q8So2tphS9ic0E--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread

* [PATCH v2] Document wal_compression=on
@ 2026-06-29 09:58 Christoph Berg <[email protected]>
  0 siblings, 0 replies; 391+ messages in thread

From: Christoph Berg @ 2026-06-29 09:58 UTC (permalink / raw)

This was not included when lz4 support was added in
4035cd5d4eee4dae797bfc77ab07f8dcd8781b41, but since the value is still
legal and even mentioned in postgresql.conf.sample, it should be
documented.

Update postgresql.conf.sample to say "on" is the same as pglz.
---
 doc/src/sgml/config.sgml                      | 1 +
 src/backend/utils/misc/postgresql.conf.sample | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 569fc0e7dba..7bdc85539ce 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -3671,6 +3671,7 @@ include_dir 'conf.d'
         was compiled with <option>--with-lz4</option>) and
         <literal>zstd</literal> (if <productname>PostgreSQL</productname>
         was compiled with <option>--with-zstd</option>).
+        The value <literal>on</literal> is an alias for <literal>pglz</literal>.
         The default value is <literal>off</literal>.
         Only superusers and users with the appropriate <literal>SET</literal>
         privilege can change this setting.
diff --git a/src/backend/utils/misc/postgresql.conf.sample b/src/backend/utils/misc/postgresql.conf.sample
index ac38cddaaf9..86f2e16eba0 100644
--- a/src/backend/utils/misc/postgresql.conf.sample
+++ b/src/backend/utils/misc/postgresql.conf.sample
@@ -262,7 +262,7 @@
 #wal_log_hints = off                    # also do full page writes of non-critical updates
                                         # (change requires restart)
 #wal_compression = off                  # enables compression of full-page writes;
-                                        # off, pglz, lz4, zstd, or on
+                                        # off, pglz (or "on"), lz4, or zstd
 #wal_init_zero = on                     # zero-fill new WAL files
 #wal_recycle = on                       # recycle WAL files
 #wal_buffers = -1                       # min 32kB, -1 sets based on shared_buffers
-- 
2.53.0


--aOuCd2U3waCadW1P--





^ permalink  raw  reply  [nested|flat] 391+ messages in thread