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Implement archive_timeout feature to force xlog file switches to occur no more

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than N seconds apart.  This allows a simple, if not very high performance,
means of guaranteeing that a PITR archive is no more than N seconds behind
real time.  Also make pg_current_xlog_location return the WAL Write pointer,
add pg_current_xlog_insert_location to return the Insert pointer, and fix
pg_xlogfile_name_offset to return its results as a two-element record instead
of a smashed-together string, as per recent discussion.

Simon Riggs
This commit is contained in:
Tom Lane
2006-08-17 23:04:10 +00:00
parent bb764e94ce
commit e8ea9e9587
11 changed files with 279 additions and 74 deletions
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3
src/include/access/xlog.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.72 2006/07/13 16:49:19 momjian Exp $
* $PostgreSQL: pgsql/src/include/access/xlog.h,v 1.73 2006/08/17 23:04:08 tgl Exp $
*/
#ifndef XLOG_H
#define XLOG_H
@@ -139,6 +139,7 @@ extern XLogRecPtr ProcLastRecEnd;
extern int CheckPointSegments;
extern int XLOGbuffers;
extern char *XLogArchiveCommand;
extern int XLogArchiveTimeout;
extern char *XLOG_sync_method;
extern const char XLOG_sync_method_default[];