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Additional mop-up for sync-to-fsync changes: avoid issuing fsyncs for

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temp tables, and avoid WAL-logging truncations of temp tables.  Do issue
fsync on truncated files (not sure this is necessary but it seems like
a good idea).
This commit is contained in:
Tom Lane
2004-05-31 20:31:33 +00:00
parent e674707968
commit 91d20ff7aa
5 changed files with 94 additions and 52 deletions
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17
src/backend/storage/buffer/bufmgr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.168 2004/05/31 19:24:05 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.169 2004/05/31 20:31:33 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -182,7 +182,8 @@ ReadBufferInternal(Relation reln, BlockNumber blockNum,
{
/* new buffers are zero-filled */
MemSet((char *) MAKE_PTR(bufHdr->data), 0, BLCKSZ);
smgrextend(reln->rd_smgr, blockNum, (char *) MAKE_PTR(bufHdr->data));
smgrextend(reln->rd_smgr, blockNum, (char *) MAKE_PTR(bufHdr->data),
reln->rd_istemp);
}
else
{
@ -915,8 +916,8 @@ BufferGetFileNode(Buffer buffer)
* NOTE: this actually just passes the buffer contents to the kernel; the
* real write to disk won't happen until the kernel feels like it. This
* is okay from our point of view since we can redo the changes from WAL.
* However, we will need to force the changes to disk via sync/fsync
* before we can checkpoint WAL.
* However, we will need to force the changes to disk via fsync before
* we can checkpoint WAL.
*
* BufMgrLock must be held at entry, and the buffer must be pinned. The
* caller is also responsible for doing StartBufferIO/TerminateBufferIO.
@ -979,7 +980,8 @@ FlushBuffer(BufferDesc *buf, SMgrRelation reln)
*/
smgrwrite(reln,
buf->tag.blockNum,
(char *) MAKE_PTR(buf->data));
(char *) MAKE_PTR(buf->data),
false);
/* Pop the error context stack */
error_context_stack = errcontext.previous;
@ -1033,7 +1035,7 @@ RelationTruncate(Relation rel, BlockNumber nblocks)
rel->rd_targblock = InvalidBlockNumber;
/* Do the real work */
smgrtruncate(rel->rd_smgr, nblocks);
smgrtruncate(rel->rd_smgr, nblocks, rel->rd_istemp);
}
/* ---------------------------------------------------------------------
@ -1351,7 +1353,8 @@ FlushRelationBuffers(Relation rel, BlockNumber firstDelBlock)
smgrwrite(rel->rd_smgr,
bufHdr->tag.blockNum,
(char *) MAKE_PTR(bufHdr->data));
(char *) MAKE_PTR(bufHdr->data),
true);
bufHdr->flags &= ~(BM_DIRTY | BM_JUST_DIRTIED);
bufHdr->cntxDirty = false;