database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-28 23:42:10 +03:00
Code Activity

Replace implementation of pg_log as a relation accessed through the

Browse Source 
buffer manager with 'pg_clog', a specialized access method modeled
on pg_xlog.  This simplifies startup (don't need to play games to
open pg_log; among other things, OverrideTransactionSystem goes away),
should improve performance a little, and opens the door to recycling
commit log space by removing no-longer-needed segments of the commit
log.  Actual recycling is not there yet, but I felt I should commit
this part separately since it'd still be useful if we chose not to
do transaction ID wraparound.
This commit is contained in:
Tom Lane
2001-08-25 18:52:43 +00:00
parent 4699d81dc9
commit 2589735da0
39 changed files with 1248 additions and 1128 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/backend/access/transam/xlog.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.74 2001/08/23 23:06:37 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xlog.c,v 1.75 2001/08/25 18:52:41 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -26,8 +26,11 @@
#include <locale.h>
#endif
#include "access/clog.h"
#include "access/transam.h"
#include "access/xact.h"
#include "access/xlog.h"
#include "access/xlogutils.h"
#include "catalog/catversion.h"
#include "catalog/pg_control.h"
#include "storage/sinval.h"
@ -35,8 +38,6 @@
#include "storage/spin.h"
#include "storage/s_lock.h"
#include "storage/bufpage.h"
#include "access/xlog.h"
#include "access/xlogutils.h"
#include "utils/builtins.h"
#include "utils/relcache.h"
#include "utils/selfuncs.h"
@ -1580,7 +1581,7 @@ MoveOfflineLogs(uint32 log, uint32 seg, XLogRecPtr endptr)
strspn(xlde->d_name, "0123456789ABCDEF") == 16 &&
strcmp(xlde->d_name, lastoff) <= 0)
{
sprintf(path, "%s/%s", XLogDir, xlde->d_name);
snprintf(path, MAXPGPATH, "%s/%s", XLogDir, xlde->d_name);
if (XLOG_archive_dir[0])
{
elog(LOG, "archiving transaction log file %s",
@ -2409,6 +2410,9 @@ BootStrapXLOG(void)
/* some additional ControlFile fields are set in WriteControlFile() */
WriteControlFile();
/* Bootstrap the commit log, too */
BootStrapCLOG();
}
static char *
@ -2543,7 +2547,6 @@ StartupXLOG(void)
ControlFile->time = time(NULL);
UpdateControlFile();
XLogOpenLogRelation(); /* open pg_log */
XLogInitRelationCache();
/* Is REDO required ? */
@ -2724,6 +2727,9 @@ StartupXLOG(void)
ThisStartUpID++;
XLogCtl->ThisStartUpID = ThisStartUpID;
/* Start up the commit log, too */
StartupCLOG();
elog(LOG, "database system is ready");
CritSectionCount--;
@ -2845,6 +2851,7 @@ ShutdownXLOG(void)
CritSectionCount++;
CreateDummyCaches();
CreateCheckPoint(true);
ShutdownCLOG();
CritSectionCount--;
elog(LOG, "database system is shut down");
@ -2981,6 +2988,9 @@ CreateCheckPoint(bool shutdown)
*/
FlushBufferPool();
/* And commit-log buffers, too */
CheckPointCLOG();
/*
* Now insert the checkpoint record into XLOG.
*/