diff options
Diffstat (limited to 'src/backend/storage/smgr/smgr.c')
| -rw-r--r-- | src/backend/storage/smgr/smgr.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/backend/storage/smgr/smgr.c b/src/backend/storage/smgr/smgr.c index 2c8cf07eec..f286b20ee2 100644 --- a/src/backend/storage/smgr/smgr.c +++ b/src/backend/storage/smgr/smgr.c @@ -11,7 +11,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.90 2005/06/17 22:32:46 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/storage/smgr/smgr.c,v 1.91 2005/06/20 18:37:01 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -650,7 +650,8 @@ smgrtruncate(SMgrRelation reln, BlockNumber nblocks, bool isTemp) /* * smgrimmedsync() -- Force the specified relation to stable storage. * - * Synchronously force all of the specified relation down to disk. + * Synchronously force all previous writes to the specified relation + * down to disk. * * This is useful for building completely new relations (eg, new * indexes). Instead of incrementally WAL-logging the index build @@ -664,6 +665,10 @@ smgrtruncate(SMgrRelation reln, BlockNumber nblocks, bool isTemp) * * The preceding writes should specify isTemp = true to avoid * duplicative fsyncs. + * + * Note that you need to do FlushRelationBuffers() first if there is + * any possibility that there are dirty buffers for the relation; + * otherwise the sync is not very meaningful. */ void smgrimmedsync(SMgrRelation reln) |