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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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21
src/backend/bootstrap/bootstrap.c
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@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.166 2003/09/02 19:04:12 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.167 2003/11/19 15:55:07 wieck Exp $
*
*-------------------------------------------------------------------------
*/
@ -428,8 +428,20 @@ BootstrapMain(int argc, char *argv[])
BaseInit();
/* needed to get LWLocks */
if (IsUnderPostmaster)
InitDummyProcess(); /* needed to get LWLocks */
{
switch (xlogop)
{
case BS_XLOG_BGWRITER:
InitDummyProcess(DUMMY_PROC_BGWRITER);
break;
default:
InitDummyProcess(DUMMY_PROC_DEFAULT);
break;
}
}
/*
* XLOG operations
@ -453,6 +465,11 @@ BootstrapMain(int argc, char *argv[])
* postmaster */
proc_exit(0); /* done */
case BS_XLOG_BGWRITER:
CreateDummyCaches();
BufferBackgroundWriter();
proc_exit(0); /* done */
case BS_XLOG_STARTUP:
StartupXLOG();
LoadFreeSpaceMap();