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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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34
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 1.23 2006/07/11 17:26:58 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/rmgr.c,v 1.24 2006/08/07 16:57:56 tgl Exp $
*/
#include "postgres.h"
@ -23,20 +23,20 @@
const RmgrData RmgrTable[RM_MAX_ID + 1] = {
{"XLOG", xlog_redo, xlog_desc, NULL, NULL},
{"Transaction", xact_redo, xact_desc, NULL, NULL},
{"Storage", smgr_redo, smgr_desc, NULL, NULL},
{"CLOG", clog_redo, clog_desc, NULL, NULL},
{"Database", dbase_redo, dbase_desc, NULL, NULL},
{"Tablespace", tblspc_redo, tblspc_desc, NULL, NULL},
{"MultiXact", multixact_redo, multixact_desc, NULL, NULL},
{"Reserved 7", NULL, NULL, NULL, NULL},
{"Reserved 8", NULL, NULL, NULL, NULL},
{"Reserved 9", NULL, NULL, NULL, NULL},
{"Heap", heap_redo, heap_desc, NULL, NULL},
{"Btree", btree_redo, btree_desc, btree_xlog_startup, btree_xlog_cleanup},
{"Hash", hash_redo, hash_desc, NULL, NULL},
{"Gin", gin_redo, gin_desc, gin_xlog_startup, gin_xlog_cleanup},
{"Gist", gist_redo, gist_desc, gist_xlog_startup, gist_xlog_cleanup},
{"Sequence", seq_redo, seq_desc, NULL, NULL}
{"XLOG", xlog_redo, xlog_desc, NULL, NULL, NULL},
{"Transaction", xact_redo, xact_desc, NULL, NULL, NULL},
{"Storage", smgr_redo, smgr_desc, NULL, NULL, NULL},
{"CLOG", clog_redo, clog_desc, NULL, NULL, NULL},
{"Database", dbase_redo, dbase_desc, NULL, NULL, NULL},
{"Tablespace", tblspc_redo, tblspc_desc, NULL, NULL, NULL},
{"MultiXact", multixact_redo, multixact_desc, NULL, NULL, NULL},
{"Reserved 7", NULL, NULL, NULL, NULL, NULL},
{"Reserved 8", NULL, NULL, NULL, NULL, NULL},
{"Reserved 9", NULL, NULL, NULL, NULL, NULL},
{"Heap", heap_redo, heap_desc, NULL, NULL, NULL},
{"Btree", btree_redo, btree_desc, btree_xlog_startup, btree_xlog_cleanup, btree_safe_restartpoint},
{"Hash", hash_redo, hash_desc, NULL, NULL, NULL},
{"Gin", gin_redo, gin_desc, gin_xlog_startup, gin_xlog_cleanup, gin_safe_restartpoint},
{"Gist", gist_redo, gist_desc, gist_xlog_startup, gist_xlog_cleanup, gist_safe_restartpoint},
{"Sequence", seq_redo, seq_desc, NULL, NULL, NULL}
};