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Tweak smgrblindwrt per advice from Vadim: add parameter indicating

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whether to do fsync or not, and if so (which should be seldom) just
do the fsync immediately.  This way we need not build data structures
in md.c/fd.c for blind writes.
This commit is contained in:
Tom Lane
2000-04-10 23:41:52 +00:00
parent a447ae2221
commit 2692d329eb
5 changed files with 95 additions and 135 deletions
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14
src/backend/storage/buffer/bufmgr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.78 2000/04/09 04:43:18 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/buffer/bufmgr.c,v 1.79 2000/04/10 23:41:49 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1127,7 +1127,8 @@ BufferSync()
bufHdr->blind.relname,
bufdb, bufrel,
bufHdr->tag.blockNum,
(char *) MAKE_PTR(bufHdr->data));
(char *) MAKE_PTR(bufHdr->data),
true); /* must fsync */
}
else
{
@ -1529,7 +1530,8 @@ BufferReplace(BufferDesc *bufHdr)
status = smgrblindwrt(DEFAULT_SMGR, bufHdr->blind.dbname,
bufHdr->blind.relname, bufdb, bufrel,
bufHdr->tag.blockNum,
(char *) MAKE_PTR(bufHdr->data));
(char *) MAKE_PTR(bufHdr->data),
false); /* no fsync */
}
#ifndef OPTIMIZE_SINGLE
@ -1544,9 +1546,11 @@ BufferReplace(BufferDesc *bufHdr)
return FALSE;
/* If we had marked this buffer as needing to be fsync'd, we can forget
* about that, because it's now the storage manager's responsibility.
* about that, because it's now the storage manager's responsibility
* (but only if we called smgrwrite, not smgrblindwrt).
*/
ClearBufferDirtiedByMe(BufferDescriptorGetBuffer(bufHdr), bufHdr);
if (reln != (Relation) NULL)
ClearBufferDirtiedByMe(BufferDescriptorGetBuffer(bufHdr), bufHdr);
BufferFlushCount++;