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Rearrange pg_subtrans handling as per recent discussion. pg_subtrans

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updates are no longer WAL-logged nor even fsync'd; we do not need to,
since after a crash no old pg_subtrans data is needed again.  We truncate
pg_subtrans to RecentGlobalXmin at each checkpoint.  slru.c's API is
refactored a little bit to separate out the necessary decisions.
This commit is contained in:
Tom Lane
2004-08-23 23:22:45 +00:00
parent 059912ce2e
commit 4dbb880d3c
13 changed files with 387 additions and 436 deletions
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6
src/backend/access/transam/rmgr.c
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@ -3,7 +3,7 @@
*
* Resource managers definition
*
* $PostgreSQL: pgsql/src/backend/access/transam/rmgr.c,v 1.14 2004/07/21 22:31:20 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/rmgr.c,v 1.15 2004/08/23 23:22:44 tgl Exp $
*/
#include "postgres.h"
@ -12,7 +12,7 @@
#include "access/heapam.h"
#include "access/nbtree.h"
#include "access/rtree.h"
#include "access/slru.h"
#include "access/clog.h"
#include "access/xact.h"
#include "access/xlog_internal.h"
#include "storage/smgr.h"
@ -23,7 +23,7 @@ const RmgrData RmgrTable[RM_MAX_ID + 1] = {
{"XLOG", xlog_redo, xlog_undo, xlog_desc, NULL, NULL},
{"Transaction", xact_redo, xact_undo, xact_desc, NULL, NULL},
{"Storage", smgr_redo, smgr_undo, smgr_desc, NULL, NULL},
{"SLRU", slru_redo, slru_undo, slru_desc, NULL, NULL},
{"CLOG", clog_redo, clog_undo, clog_desc, NULL, NULL},
{"Reserved 4", NULL, NULL, NULL, NULL, NULL},
{"Reserved 5", NULL, NULL, NULL, NULL, NULL},
{"Reserved 6", NULL, NULL, NULL, NULL, NULL},