public inbox for [email protected]  

help / color / mirror / Atom feed

From: vignesh C <[email protected]>
To: Nisha Moond <[email protected]>
Cc: Peter Smith <[email protected]>
Cc: Hayato Kuroda (Fujitsu) <[email protected]>
Cc: shveta malik <[email protected]>
Cc: Bharath Rupireddy <[email protected]>
Cc: Amit Kapila <[email protected]>
Cc: Ajin Cherian <[email protected]>
Cc: Bertrand Drouvot <[email protected]>
Cc: Masahiko Sawada <[email protected]>
Cc: Nathan Bossart <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Introduce XID age and inactive timeout based replication slot invalidation
Date: Thu, 12 Dec 2024 09:42:35 +0530
Message-ID: <CALDaNm1FQS04aG0C0gCRpvi-o-OTdq91y6Az34YKN-dVc9r5Ng@mail.gmail.com> (raw)
In-Reply-To: <CABdArM7CPR0Ag6OgtufATUn+x=Q_h3cdBcc39r+xeKYDks5Mfw@mail.gmail.com>
References: <CALDaNm39dtWHoQej2wd74zYGphA0e54Rx6aTRoCEnMXZ5ysbow@mail.gmail.com>
	<CABdArM45=j=DAFTEZA8p=oqYo-XqRwhaPCdKpciQCJx+jNeTJg@mail.gmail.com>
	<TYAPR01MB5692B7687EE7981AA91BA5B9F5362@TYAPR01MB5692.jpnprd01.prod.outlook.com>
	<CABdArM4N60XShbmxXgz4z8ENQGPOMhXSKzvmskdv8V=mQsYOOA@mail.gmail.com>
	<CALDaNm0mTWwg0z4v-sorq08S2CdZmL2s+rh4nHpWeJaBQ2F+mg@mail.gmail.com>
	<CAHut+Psi-mso-qSyMkHRP8e+psDFFmMp4NZTiL_yrFWidHkGMw@mail.gmail.com>
	<CALDaNm3znxKvTv=MDmMBOSk6XurkKgYyh9cH49NLL7SmJ62Q_A@mail.gmail.com>
	<CABdArM7CPR0Ag6OgtufATUn+x=Q_h3cdBcc39r+xeKYDks5Mfw@mail.gmail.com>

On Tue, 10 Dec 2024 at 17:21, Nisha Moond <[email protected]> wrote:
>
> On Fri, Dec 6, 2024 at 11:04 AM vignesh C <[email protected]> wrote:
> >
> >
> > Determining the correct time may be challenging for users, as it
> > depends on when the active_since value is set, as well as when the
> > checkpoint_timeout occurs and the subsequent checkpoint is triggered.
> > Even if the user sets it to an appropriate value, there is still a
> > possibility of delayed identification due to the timing of when the
> > slot's active_timeout is being set. Including this information in the
> > documentation should be sufficient.
> >
>
> +1
> v54 documents this information as suggested.
>
> Attached the v54 patch-set addressing all the comments till now in
> [1], [2] and [3].

Now that we support idle_replication_slot_timeout in milliseconds, we
can set this value from 1s to 1ms or 10millseconds and change sleep to
usleep, this will bring down the test execution time significantly:
+# Set timeout GUC on the standby to verify that the next checkpoint will not
+# invalidate synced slots.
+my $idle_timeout_1s = 1;
+$standby1->safe_psql(
+       'postgres', qq[
+    ALTER SYSTEM SET idle_replication_slot_timeout TO '${idle_timeout_1s}s';
+]);
+$standby1->reload;
+
+# Sync the primary slots to the standby
+$standby1->safe_psql('postgres', "SELECT pg_sync_replication_slots();");
+
+# Confirm that the logical failover slot is created on the standby
+is( $standby1->safe_psql(
+               'postgres',
+               q{SELECT count(*) = 1 FROM pg_replication_slots
+                 WHERE slot_name = 'sync_slot1' AND synced
+                       AND NOT temporary
+                       AND invalidation_reason IS NULL;}
+       ),
+       "t",
+       'logical slot sync_slot1 is synced to standby');
+
+# Give enough time for inactive_since to exceed the timeout
+sleep($idle_timeout_1s + 1);

Regards,
Vignesh

view thread (98+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected], [email protected]
  Subject: Re: Introduce XID age and inactive timeout based replication slot invalidation
  In-Reply-To: <CALDaNm1FQS04aG0C0gCRpvi-o-OTdq91y6Az34YKN-dVc9r5Ng@mail.gmail.com>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox