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Buffer manager modifications to keep a local buffer-dirtied bit as well

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as a shared dirtybit for each shared buffer.  The shared dirtybit still
controls writing the buffer, but the local bit controls whether we need
to fsync the buffer's file.  This arrangement fixes a bug that allowed
some required fsyncs to be missed, and should improve performance as well.
For more info see my post of same date on pghackers.
This commit is contained in:
Tom Lane
2000-04-09 04:43:20 +00:00
parent 9c38a8d296
commit 1f6d8b90b8
13 changed files with 955 additions and 435 deletions
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4
src/include/storage/bufmgr.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: bufmgr.h,v 1.35 2000/03/31 02:43:30 tgl Exp $
* $Id: bufmgr.h,v 1.36 2000/04/09 04:43:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -164,7 +164,7 @@ extern int FlushBuffer(Buffer buffer, bool release);
extern void InitBufferPool(IPCKey key);
extern void PrintBufferUsage(FILE *statfp);
extern void ResetBufferUsage(void);
extern void ResetBufferPool(void);
extern void ResetBufferPool(bool isCommit);
extern int BufferPoolCheckLeak(void);
extern void FlushBufferPool(void);
extern BlockNumber BufferGetBlockNumber(Buffer buffer);