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Commit77bb65d

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committed
Revert based on Tom's recommendation:
> Allow VACUUM to complete faster by avoiding scanning the indexes when no> rows were removed from the heap by the VACUUM.
1 parentbf32494 commit77bb65d

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7 files changed

+29
-65
lines changed

7 files changed

+29
-65
lines changed

‎src/backend/access/gist/gistvacuum.c

Lines changed: 7 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/access/gist/gistvacuum.c,v 1.12 2006/02/1116:59:08 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/access/gist/gistvacuum.c,v 1.13 2006/02/1117:14:08 momjian Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -125,7 +125,7 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
125125
if (chldtuple.ituplen>1)
126126
{
127127
/*
128-
* child wassplit, so we need mark completion
128+
* child wassplitted, so we need mark completion
129129
* insert(split)
130130
*/
131131
intj;
@@ -329,9 +329,9 @@ gistVacuumUpdate(GistVacuum *gv, BlockNumber blkno, bool needunion)
329329
}
330330

331331
/*
332-
* Forusual vacuum just update FSM, for full vacuum
332+
* Forusial vacuum just update FSM, for full vacuum
333333
* reforms parent tuples if some of childs was deleted or changed,
334-
* update invalid tuples (they canexist from last crash recovery only),
334+
* update invalid tuples (they canexsist from last crash recovery only),
335335
* tries to get smaller index
336336
*/
337337

@@ -505,15 +505,10 @@ gistbulkdelete(PG_FUNCTION_ARGS)
505505
*ptr;
506506
boolneedLock;
507507

508-
if (callback_state)
509-
{
510-
stack= (GistBDItem*)palloc0(sizeof(GistBDItem));
508+
stack= (GistBDItem*)palloc0(sizeof(GistBDItem));
511509

512-
stack->blkno=GIST_ROOT_BLKNO;
513-
needFullVacuum= false;
514-
}
515-
else
516-
stack=NULL;
510+
stack->blkno=GIST_ROOT_BLKNO;
511+
needFullVacuum= false;
517512

518513
while (stack)
519514
{

‎src/backend/access/hash/hash.c

Lines changed: 6 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/access/hash/hash.c,v 1.84 2006/02/1116:59:09 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/access/hash/hash.c,v 1.85 2006/02/1117:14:08 momjian Exp $
1212
*
1313
* NOTES
1414
* This file contains only the public interface routines.
@@ -496,17 +496,6 @@ hashbulkdelete(PG_FUNCTION_ARGS)
496496
tuples_removed=0;
497497
num_index_tuples=0;
498498

499-
/* return statistics */
500-
num_pages=RelationGetNumberOfBlocks(rel);
501-
502-
result= (IndexBulkDeleteResult*)palloc0(sizeof(IndexBulkDeleteResult));
503-
result->num_pages=num_pages;
504-
505-
if (!callback_state)
506-
{
507-
PG_RETURN_POINTER(result);
508-
}
509-
510499
/*
511500
* Read the metapage to fetch original bucket and tuple counts. Also, we
512501
* keep a copy of the last-seen metapage so that we can use its
@@ -655,6 +644,11 @@ hashbulkdelete(PG_FUNCTION_ARGS)
655644

656645
_hash_wrtbuf(rel,metabuf);
657646

647+
/* return statistics */
648+
num_pages=RelationGetNumberOfBlocks(rel);
649+
650+
result= (IndexBulkDeleteResult*)palloc0(sizeof(IndexBulkDeleteResult));
651+
result->num_pages=num_pages;
658652
result->num_index_tuples=num_index_tuples;
659653
result->tuples_removed=tuples_removed;
660654

‎src/backend/access/index/indexam.c

Lines changed: 1 addition & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $PostgreSQL: pgsql/src/backend/access/index/indexam.c,v 1.88 2006/02/1116:59:09 momjian Exp $
11+
* $PostgreSQL: pgsql/src/backend/access/index/indexam.c,v 1.89 2006/02/1117:14:08 momjian Exp $
1212
*
1313
* INTERFACE ROUTINES
1414
*index_open- open an index relation by relation OID
@@ -685,11 +685,6 @@ index_getmulti(IndexScanDesc scan,
685685
*callback routine tells whether a given main-heap tuple is
686686
*to be deleted
687687
*
688-
* passing NULL callback_state can be interpreted by the
689-
* index access method as meaning that the index does not need
690-
* to be scanned in logical sequence to remove rows for this call
691-
* index_vacuum_cleanup is always required after this, however.
692-
*
693688
*return value is an optional palloc'd struct of statistics
694689
* ----------------
695690
*/

‎src/backend/access/nbtree/nbtree.c

Lines changed: 5 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -12,7 +12,7 @@
1212
* Portions Copyright (c) 1994, Regents of the University of California
1313
*
1414
* IDENTIFICATION
15-
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.137 2006/02/1116:59:09 momjian Exp $
15+
* $PostgreSQL: pgsql/src/backend/access/nbtree/nbtree.c,v 1.138 2006/02/1117:14:08 momjian Exp $
1616
*
1717
*-------------------------------------------------------------------------
1818
*/
@@ -543,9 +543,8 @@ btbulkdelete(PG_FUNCTION_ARGS)
543543
doublenum_index_tuples;
544544
OffsetNumberdeletable[MaxOffsetNumber];
545545
intndeletable;
546-
Bufferbuf=NULL;
546+
Bufferbuf;
547547
BlockNumbernum_pages;
548-
boolscanindex= true;
549548

550549
tuples_removed=0;
551550
num_index_tuples=0;
@@ -566,15 +565,8 @@ btbulkdelete(PG_FUNCTION_ARGS)
566565
* skip obtaining exclusive lock on empty pages though, since no indexscan
567566
* could be stopped on those.
568567
*/
569-
if (callback_state)
570-
{
571-
buf=_bt_get_endpoint(rel,0, false);
572-
scanindex=BufferIsValid(buf);/* check for empty index */
573-
}
574-
else
575-
scanindex= false;
576-
577-
if (scanindex)
568+
buf=_bt_get_endpoint(rel,0, false);
569+
if (BufferIsValid(buf))/* check for empty index */
578570
{
579571
for (;;)
580572
{
@@ -657,10 +649,7 @@ btbulkdelete(PG_FUNCTION_ARGS)
657649

658650
result= (IndexBulkDeleteResult*)palloc0(sizeof(IndexBulkDeleteResult));
659651
result->num_pages=num_pages;
660-
if (scanindex)
661-
result->num_index_tuples=num_index_tuples;
662-
else
663-
result->num_index_tuples=-1;
652+
result->num_index_tuples=num_index_tuples;
664653
result->tuples_removed=tuples_removed;
665654

666655
PG_RETURN_POINTER(result);

‎src/backend/commands/vacuum.c

Lines changed: 5 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -13,7 +13,7 @@
1313
*
1414
*
1515
* IDENTIFICATION
16-
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.322 2006/02/1116:59:09 momjian Exp $
16+
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.323 2006/02/1117:14:09 momjian Exp $
1717
*
1818
*-------------------------------------------------------------------------
1919
*/
@@ -719,8 +719,7 @@ vac_update_relstats(Oid relid, BlockNumber num_pages, double num_tuples,
719719
/* overwrite the existing statistics in the tuple */
720720
pgcform= (Form_pg_class)GETSTRUCT(&rtup);
721721
pgcform->relpages= (int32)num_pages;
722-
if (num_tuples >=0 )
723-
pgcform->reltuples= (float4)num_tuples;
722+
pgcform->reltuples= (float4)num_tuples;
724723
pgcform->relhasindex=hasindex;
725724

726725
/*
@@ -2962,18 +2961,15 @@ scan_index(Relation indrel, double num_tuples)
29622961
if (!stats)
29632962
return;
29642963

2965-
/* now update statistics in pg_class
2966-
* we use the number of tuples from the table because we have not
2967-
* actually scanned the index, so don't know the number of tuples in index
2968-
*/
2964+
/* now update statistics in pg_class */
29692965
vac_update_relstats(RelationGetRelid(indrel),
2970-
stats->num_pages,num_tuples,
2966+
stats->num_pages,stats->num_index_tuples,
29712967
false);
29722968

29732969
ereport(elevel,
29742970
(errmsg("index \"%s\" now contains %.0f row versions in %u pages",
29752971
RelationGetRelationName(indrel),
2976-
num_tuples,
2972+
stats->num_index_tuples,
29772973
stats->num_pages),
29782974
errdetail("%u index pages have been deleted, %u are currently reusable.\n"
29792975
"%s.",

‎src/backend/commands/vacuumlazy.c

Lines changed: 4 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -31,7 +31,7 @@
3131
*
3232
*
3333
* IDENTIFICATION
34-
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.64 2006/02/1116:59:09 momjian Exp $
34+
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.65 2006/02/1117:14:09 momjian Exp $
3535
*
3636
*-------------------------------------------------------------------------
3737
*/
@@ -639,19 +639,16 @@ lazy_scan_index(Relation indrel, LVRelStats *vacrelstats)
639639
if (!stats)
640640
return;
641641

642-
/* now update statistics in pg_class
643-
* we use the number of tuples from the table because we have not
644-
* actually scanned the index, so don't know the number of tuples in index
645-
*/
642+
/* now update statistics in pg_class */
646643
vac_update_relstats(RelationGetRelid(indrel),
647644
stats->num_pages,
648-
vacrelstats->rel_tuples,
645+
stats->num_index_tuples,
649646
false);
650647

651648
ereport(elevel,
652649
(errmsg("index \"%s\" now contains %.0f row versions in %u pages",
653650
RelationGetRelationName(indrel),
654-
vacrelstats->rel_tuples,
651+
stats->num_index_tuples,
655652
stats->num_pages),
656653
errdetail("%u index pages have been deleted, %u are currently reusable.\n"
657654
"%s.",

‎src/include/access/genam.h

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
88
* Portions Copyright (c) 1994, Regents of the University of California
99
*
10-
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.55 2006/02/1116:59:09 momjian Exp $
10+
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.56 2006/02/1117:14:09 momjian Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -38,8 +38,6 @@ typedef struct IndexBulkDeleteResult
3838
BlockNumbernum_pages;/* pages remaining in index */
3939
BlockNumberpages_removed;/* # removed by bulk-delete operation */
4040
doublenum_index_tuples;/* tuples remaining */
41-
/* should set to -1 if index not scanned */
42-
/* because no records to delete */
4341
doubletuples_removed;/* # removed by bulk-delete operation */
4442
BlockNumberpages_deleted;/* # unused pages in index */
4543
BlockNumberpages_free;/* # pages available for reuse */

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