Avoid 'FATAL: out of free buffers: time to abort !" error

Hiroshi Inoue · Hiroshi Inoue · commit 50e3c60b9579 · 2001-02-22T08:59:40.000Z
during WAL recovery.  Recovery failure is always serious.
diff --git a/src/backend/access/transam/xlogutils.c b/src/backend/access/transam/xlogutils.c
@@ -198,6 +198,8 @@ XLogReadBuffer(bool extend, Relation reln, BlockNumber blkno)
 			Assert(InRecovery);
 			while (lastblock <= blkno)
 			{
+				if (buffer != InvalidBuffer)
+                                        ReleaseBuffer(buffer); /* must be WriteBuffer()? */
 				buffer = ReadBuffer(reln, P_NEW);
 				lastblock++;
 			}

Original file line number	Diff line number	Diff line change
`@@ -198,6 +198,8 @@ XLogReadBuffer(bool extend, Relation reln, BlockNumber blkno)`
`198`	`198`	`Assert(InRecovery);`
`199`	`199`	`while (lastblock <= blkno)`
`200`	`200`	`{`
	`201`	`+ if (buffer != InvalidBuffer)`
	`202`	`+ ReleaseBuffer(buffer); /* must be WriteBuffer()? */`
`201`	`203`	`buffer = ReadBuffer(reln, P_NEW);`
`202`	`204`	`lastblock++;`
`203`	`205`	`}`