postgres.git / summary / log / commit / refs

commit    e1ca691f6b81bda44d2971e090804f0b94834711
Author:   Simon Riggs <simon@2ndQuadrant.com>
Date:     Fri Jun 26 23:48:27 2015 +0000

    Avoid hot standby cancels from VAC FREEZE
    
    VACUUM FREEZE generated false cancelations of standby queries on an
    otherwise idle master. Caused by an off-by-one error on cutoff_xid
    which goes back to original commit.
    
    Backpatch to all versions 9.0+
    
    Analysis and report by Marco Nenciarini
    
    Bug fix by Simon Riggs


 src/backend/access/heap/heapam.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/backend/access/heap/heapam.c b/src/backend/access/heap/heapam.c
index 76d30c33554..0bb1382efb0 100644
--- a/src/backend/access/heap/heapam.c
+++ b/src/backend/access/heap/heapam.c
@@ -4239,7 +4239,13 @@ heap_xlog_freeze(XLogRecPtr lsn, XLogRecord *record)
 	 * consider the frozen xids as running.
 	 */
 	if (InHotStandby)
-		ResolveRecoveryConflictWithSnapshot(cutoff_xid, xlrec->node);
+	{
+		TransactionId latestRemovedXid = cutoff_xid;
+
+		TransactionIdRetreat(latestRemovedXid);
+
+		ResolveRecoveryConflictWithSnapshot(latestRemovedXid, rnode);
+	}
 
 	/* If we have a full-page image, restore it and we're done */
 	if (record->xl_info & XLR_BKP_BLOCK(0))


[parent: 45c69178b5ff]