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Background writer process

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This first part of the background writer does no syncing at all.
It's only purpose is to keep the LRU heads clean so that regular
backends seldom to never have to call write().

Jan
This commit is contained in:
Jan Wieck
2003-11-19 15:55:08 +00:00
parent 5032f83082
commit cfeca62148
12 changed files with 271 additions and 42 deletions
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12
src/include/storage/bufmgr.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: bufmgr.h,v 1.70 2003/08/10 19:48:08 tgl Exp $
* $Id: bufmgr.h,v 1.71 2003/11/19 15:55:08 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@@ -28,6 +28,11 @@ extern DLLIMPORT int NBuffers;
/* in bufmgr.c */
extern bool zero_damaged_pages;
extern int BgWriterDelay;
extern int BgWriterPercent;
extern int BgWriterMaxpages;
/* in buf_init.c */
extern DLLIMPORT Block *BufferBlockPointers;
extern long *PrivateRefCount;
@@ -186,7 +191,10 @@ extern void LockBufferForCleanup(Buffer buffer);
extern void AbortBufferIO(void);
extern void BufmgrCommit(void);
extern void BufferSync(void);
extern int BufferSync(int percent, int maxpages);
extern void BufferBackgroundWriter(void);
extern const char *BgWriterAssignSyncMethod(const char *method,
bool doid, bool interactive);
extern void InitLocalBuffer(void);