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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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4
src/include/access/rmgr.h
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@@ -3,7 +3,7 @@
*
* Resource managers definition
*
* $PostgreSQL: pgsql/src/include/access/rmgr.h,v 1.11 2004/07/01 00:51:38 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/rmgr.h,v 1.12 2004/08/23 23:22:45 tgl Exp $
*/
#ifndef RMGR_H
#define RMGR_H
@@ -16,7 +16,7 @@ typedef uint8 RmgrId;
#define RM_XLOG_ID 0
#define RM_XACT_ID 1
#define RM_SMGR_ID 2
#define RM_SLRU_ID 3
#define RM_CLOG_ID 3
#define RM_HEAP_ID 10
#define RM_BTREE_ID 11
#define RM_HASH_ID 12