diff options
Diffstat (limited to 'src/backend/access/heap/hio.c')
| -rw-r--r-- | src/backend/access/heap/hio.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/backend/access/heap/hio.c b/src/backend/access/heap/hio.c index 602ad748d9b..67eb4ad7e24 100644 --- a/src/backend/access/heap/hio.c +++ b/src/backend/access/heap/hio.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Id: hio.c,v 1.45 2002/06/20 20:29:25 momjian Exp $ + * $Id: hio.c,v 1.46 2002/08/06 02:36:33 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -102,6 +102,7 @@ RelationGetBufferForTuple(Relation relation, Size len, Size pageFreeSpace; BlockNumber targetBlock, otherBlock; + bool needLock; len = MAXALIGN(len); /* be conservative */ @@ -231,9 +232,12 @@ RelationGetBufferForTuple(Relation relation, Size len, * * We have to use a lock to ensure no one else is extending the rel at * the same time, else we will both try to initialize the same new - * page. + * page. We can skip locking for new or temp relations, however, + * since no one else could be accessing them. */ - if (!relation->rd_myxactonly) + needLock = !(relation->rd_isnew || relation->rd_istemp); + + if (needLock) LockPage(relation, 0, ExclusiveLock); /* @@ -249,7 +253,7 @@ RelationGetBufferForTuple(Relation relation, Size len, * Release the file-extension lock; it's now OK for someone else to * extend the relation some more. */ - if (!relation->rd_myxactonly) + if (needLock) UnlockPage(relation, 0, ExclusiveLock); /* |