database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-22 21:53:06 +03:00
Code Activity

Rearrange pg_subtrans handling as per recent discussion. pg_subtrans

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

13
src/include/access/clog.h
View File

@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/clog.h,v 1.9 2004/07/01 00:51:38 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/clog.h,v 1.10 2004/08/23 23:22:45 tgl Exp $
*/
#ifndef CLOG_H
#define CLOG_H
@@ -27,9 +27,6 @@ typedef int XidStatus;
#define TRANSACTION_STATUS_ABORTED 0x02
#define TRANSACTION_STATUS_SUB_COMMITTED 0x03
/* exported because lwlock.c needs it */
#define NUM_CLOG_BUFFERS 8
extern void TransactionIdSetStatus(TransactionId xid, XidStatus status);
extern XidStatus TransactionIdGetStatus(TransactionId xid);
@@ -42,6 +39,12 @@ extern void ShutdownCLOG(void);
extern void CheckPointCLOG(void);
extern void ExtendCLOG(TransactionId newestXact);
extern void TruncateCLOG(TransactionId oldestXact);
extern void clog_zeropage_redo(int pageno);
/* XLOG stuff */
#define CLOG_ZEROPAGE 0x00
extern void clog_redo(XLogRecPtr lsn, XLogRecord *record);
extern void clog_undo(XLogRecPtr lsn, XLogRecord *record);
extern void clog_desc(char *buf, uint8 xl_info, char *rec);
#endif /* CLOG_H */