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Make recovery from WAL be restartable, by executing a checkpoint-like

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operation every so often.  This improves the usefulness of PITR log
shipping for hot standby: formerly, if the standby server crashed, it
was necessary to restart it from the last base backup and replay all
the WAL since then.  Now it will only need to reread about the same
amount of WAL as the master server would.  The behavior might also
come in handy during a long PITR replay sequence.  Simon Riggs,
with some editorialization by Tom Lane.
This commit is contained in:
Tom Lane
2006-08-07 16:57:57 +00:00
parent 977ac90001
commit e002836913
12 changed files with 273 additions and 115 deletions
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3
src/include/access/gin.h
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@@ -3,7 +3,7 @@
* header file for postgres inverted index access method implementation.
*
* Copyright (c) 2006, PostgreSQL Global Development Group
* $PostgreSQL: pgsql/src/include/access/gin.h,v 1.5 2006/07/11 16:55:34 teodor Exp $
* $PostgreSQL: pgsql/src/include/access/gin.h,v 1.6 2006/08/07 16:57:57 tgl Exp $
*--------------------------------------------------------------------------
*/
@@ -234,6 +234,7 @@ extern void gin_redo(XLogRecPtr lsn, XLogRecord *record);
extern void gin_desc(StringInfo buf, uint8 xl_info, char *rec);
extern void gin_xlog_startup(void);
extern void gin_xlog_cleanup(void);
extern bool gin_safe_restartpoint(void);
/* ginbtree.c */

3
src/include/access/gist_private.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/gist_private.h,v 1.22 2006/07/11 21:05:57 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/gist_private.h,v 1.23 2006/08/07 16:57:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -251,6 +251,7 @@ extern void gist_redo(XLogRecPtr lsn, XLogRecord *record);
extern void gist_desc(StringInfo buf, uint8 xl_info, char *rec);
extern void gist_xlog_startup(void);
extern void gist_xlog_cleanup(void);
extern bool gist_safe_restartpoint(void);
extern IndexTuple gist_form_invalid_tuple(BlockNumber blkno);
extern XLogRecData *formUpdateRdata(RelFileNode node, Buffer buffer,

3
src/include/access/nbtree.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.102 2006/07/25 19:13:00 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.103 2006/08/07 16:57:57 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -545,5 +545,6 @@ extern void btree_redo(XLogRecPtr lsn, XLogRecord *record);
extern void btree_desc(StringInfo buf, uint8 xl_info, char *rec);
extern void btree_xlog_startup(void);
extern void btree_xlog_cleanup(void);
extern bool btree_safe_restartpoint(void);
#endif /* NBTREE_H */

3
src/include/access/xlog_internal.h
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@@ -11,7 +11,7 @@
* 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_internal.h,v 1.14 2006/08/06 03:53:44 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/xlog_internal.h,v 1.15 2006/08/07 16:57:57 tgl Exp $
*/
#ifndef XLOG_INTERNAL_H
#define XLOG_INTERNAL_H
@@ -232,6 +232,7 @@ typedef struct RmgrData
void (*rm_desc) (StringInfo buf, uint8 xl_info, char *rec);
void (*rm_startup) (void);
void (*rm_cleanup) (void);
bool (*rm_safe_restartpoint) (void);
} RmgrData;
extern const RmgrData RmgrTable[];