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

during WAL recovery.  Recovery failure is always serious.

diff --git a/src/backend/access/transam/xlogutils.c b/src/backend/access/transam/xlogutils.c
index 6ff51d01fd413dfb0dc13eea3e92e617c7357404..8735db1ae1c577d62a5a707d166b4bbe31b5ac3d 100644 (file)
--- 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++;
            }