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postgresql/src/backend/access/transam/rmgr.c

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Replace implementation of pg_log as a relation accessed through the buffer manager with 'pg_clog', a specialized access method modeled on pg_xlog. This simplifies startup (don't need to play games to open pg_log; among other things, OverrideTransactionSystem goes away), should improve performance a little, and opens the door to recycling commit log space by removing no-longer-needed segments of the commit log. Actual recycling is not there yet, but I felt I should commit this part separately since it'd still be useful if we chose not to do transaction ID wraparound.
2001-08-25 20:52:43 +02:00
/*
* rmgr.c
*
* Resource managers definition
*
Add WAL logging for CREATE/DROP DATABASE and CREATE/DROP TABLESPACE. Fix TablespaceCreateDbspace() to be able to create a dummy directory in place of a dropped tablespace's symlink. This eliminates the open problem of a PANIC during WAL replay when a replayed action attempts to touch a file in a since-deleted tablespace. It also makes for a significant improvement in the usability of PITR replay.
2004-08-29 23:08:48 +02:00
* $PostgreSQL: pgsql/src/backend/access/transam/rmgr.c,v 1.16 2004/08/29 21:08:47 tgl Exp $
Replace implementation of pg_log as a relation accessed through the buffer manager with 'pg_clog', a specialized access method modeled on pg_xlog. This simplifies startup (don't need to play games to open pg_log; among other things, OverrideTransactionSystem goes away), should improve performance a little, and opens the door to recycling commit log space by removing no-longer-needed segments of the commit log. Actual recycling is not there yet, but I felt I should commit this part separately since it'd still be useful if we chose not to do transaction ID wraparound.
2001-08-25 20:52:43 +02:00
*/
Transaction log manager core code. It doesn't work currently but also don't break anything -:)
1999-09-27 17:48:12 +02:00
#include "postgres.h"
Replace implementation of pg_log as a relation accessed through the buffer manager with 'pg_clog', a specialized access method modeled on pg_xlog. This simplifies startup (don't need to play games to open pg_log; among other things, OverrideTransactionSystem goes away), should improve performance a little, and opens the door to recycling commit log space by removing no-longer-needed segments of the commit log. Actual recycling is not there yet, but I felt I should commit this part separately since it'd still be useful if we chose not to do transaction ID wraparound.
2001-08-25 20:52:43 +02:00
Add WAL logging for CREATE/DROP DATABASE and CREATE/DROP TABLESPACE. Fix TablespaceCreateDbspace() to be able to create a dummy directory in place of a dropped tablespace's symlink. This eliminates the open problem of a PANIC during WAL replay when a replayed action attempts to touch a file in a since-deleted tablespace. It also makes for a significant improvement in the usability of PITR replay.
2004-08-29 23:08:48 +02:00
#include "access/clog.h"
Put external declarations into header files.
2000-11-21 22:16:06 +01:00
#include "access/gist.h"
#include "access/hash.h"
#include "access/heapam.h"
#include "access/nbtree.h"
#include "access/rtree.h"
#include "access/xact.h"
Invent WAL timelines, as per recent discussion, to make point-in-time recovery more manageable. Also, undo recent change to add FILE_HEADER and WASTED_SPACE records to XLOG; instead make the XLOG page header variable-size with extra fields in the first page of an XLOG file. This should fix the boundary-case bugs observed by Mark Kirkwood. initdb forced due to change of XLOG representation.
2004-07-22 00:31:26 +02:00
#include "access/xlog_internal.h"
Add WAL logging for CREATE/DROP DATABASE and CREATE/DROP TABLESPACE. Fix TablespaceCreateDbspace() to be able to create a dummy directory in place of a dropped tablespace's symlink. This eliminates the open problem of a PANIC during WAL replay when a replayed action attempts to touch a file in a since-deleted tablespace. It also makes for a significant improvement in the usability of PITR replay.
2004-08-29 23:08:48 +02:00
#include "commands/dbcommands.h"
XLOG stuff for sequences. CommitDelay in guc.c
2000-11-30 02:47:33 +01:00
#include "commands/sequence.h"
Add WAL logging for CREATE/DROP DATABASE and CREATE/DROP TABLESPACE. Fix TablespaceCreateDbspace() to be able to create a dummy directory in place of a dropped tablespace's symlink. This eliminates the open problem of a PANIC during WAL replay when a replayed action attempts to touch a file in a since-deleted tablespace. It also makes for a significant improvement in the usability of PITR replay.
2004-08-29 23:08:48 +02:00
#include "commands/tablespace.h"
#include "storage/smgr.h"
WAL
2000-10-21 17:43:36 +02:00
Replace implementation of pg_log as a relation accessed through the buffer manager with 'pg_clog', a specialized access method modeled on pg_xlog. This simplifies startup (don't need to play games to open pg_log; among other things, OverrideTransactionSystem goes away), should improve performance a little, and opens the door to recycling commit log space by removing no-longer-needed segments of the commit log. Actual recycling is not there yet, but I felt I should commit this part separately since it'd still be useful if we chose not to do transaction ID wraparound.
2001-08-25 20:52:43 +02:00
Invent WAL timelines, as per recent discussion, to make point-in-time recovery more manageable. Also, undo recent change to add FILE_HEADER and WASTED_SPACE records to XLOG; instead make the XLOG page header variable-size with extra fields in the first page of an XLOG file. This should fix the boundary-case bugs observed by Mark Kirkwood. initdb forced due to change of XLOG representation.
2004-07-22 00:31:26 +02:00
const RmgrData RmgrTable[RM_MAX_ID + 1] = {
Make btree index structure adjustments and WAL logging changes needed to support btree compaction, as per proposal of a few days ago. btree index pages no longer store parent links, instead they have a level indicator (counting up from zero for leaf pages). The FixBTree recovery logic is removed, and replaced by code that detects missing parent-level insertions during WAL replay. Also, generate appropriate WAL entries when updating btree metapage and when building a btree index from scratch. I believe btree indexes are now completely WAL-legal for the first time. initdb forced due to index and WAL changes.
2003-02-21 01:06:22 +01:00
{"XLOG", xlog_redo, xlog_undo, xlog_desc, NULL, NULL},
{"Transaction", xact_redo, xact_undo, xact_desc, NULL, NULL},
{"Storage", smgr_redo, smgr_undo, smgr_desc, NULL, NULL},
Rearrange pg_subtrans handling as per recent discussion. pg_subtrans 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.
2004-08-24 01:22:45 +02:00
{"CLOG", clog_redo, clog_undo, clog_desc, NULL, NULL},
Add WAL logging for CREATE/DROP DATABASE and CREATE/DROP TABLESPACE. Fix TablespaceCreateDbspace() to be able to create a dummy directory in place of a dropped tablespace's symlink. This eliminates the open problem of a PANIC during WAL replay when a replayed action attempts to touch a file in a since-deleted tablespace. It also makes for a significant improvement in the usability of PITR replay.
2004-08-29 23:08:48 +02:00
{"Database", dbase_redo, dbase_undo, dbase_desc, NULL, NULL},
{"Tablespace", tblspc_redo, tblspc_undo, tblspc_desc, NULL, NULL},
Make btree index structure adjustments and WAL logging changes needed to support btree compaction, as per proposal of a few days ago. btree index pages no longer store parent links, instead they have a level indicator (counting up from zero for leaf pages). The FixBTree recovery logic is removed, and replaced by code that detects missing parent-level insertions during WAL replay. Also, generate appropriate WAL entries when updating btree metapage and when building a btree index from scratch. I believe btree indexes are now completely WAL-legal for the first time. initdb forced due to index and WAL changes.
2003-02-21 01:06:22 +01:00
{"Reserved 6", NULL, NULL, 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_undo, heap_desc, NULL, NULL},
{"Btree", btree_redo, btree_undo, btree_desc,
pgindent run.
2003-08-04 02:43:34 +02:00
btree_xlog_startup, btree_xlog_cleanup},
Make btree index structure adjustments and WAL logging changes needed to support btree compaction, as per proposal of a few days ago. btree index pages no longer store parent links, instead they have a level indicator (counting up from zero for leaf pages). The FixBTree recovery logic is removed, and replaced by code that detects missing parent-level insertions during WAL replay. Also, generate appropriate WAL entries when updating btree metapage and when building a btree index from scratch. I believe btree indexes are now completely WAL-legal for the first time. initdb forced due to index and WAL changes.
2003-02-21 01:06:22 +01:00
{"Hash", hash_redo, hash_undo, hash_desc, NULL, NULL},
{"Rtree", rtree_redo, rtree_undo, rtree_desc, NULL, NULL},
{"Gist", gist_redo, gist_undo, gist_desc, NULL, NULL},
{"Sequence", seq_redo, seq_undo, seq_desc, NULL, NULL}
WAL
2000-10-21 17:43:36 +02:00
};