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Utilize the visibility map in autovacuum, too. There was an oversight in

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the visibility map patch that because autovacuum always sets
VacuumStmt->freeze_min_age, visibility map was never used for autovacuum,
only for manually launched vacuums. This patch introduces a new scan_all
field to VacuumStmt, indicating explicitly whether the visibility map
should be used, or the whole relation should be scanned, to advance
relfrozenxid. Anti-wraparound vacuums still need to scan all pages.
This commit is contained in:
Heikki Linnakangas
2008-12-04 11:42:24 +00:00
parent 69b3383cfb
commit 7537f52a00
6 changed files with 14 additions and 14 deletions
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5
src/backend/parser/gram.y
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@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.641 2008/11/26 08:45:11 petere Exp $
* $PostgreSQL: pgsql/src/backend/parser/gram.y,v 2.642 2008/12/04 11:42:24 heikki Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -5837,6 +5837,7 @@ VacuumStmt: VACUUM opt_full opt_freeze opt_verbose
n->analyze = false;
n->full = $2;
n->freeze_min_age = $3 ? 0 : -1;
n->scan_all = $3;
n->verbose = $4;
n->relation = NULL;
n->va_cols = NIL;
@@ -5849,6 +5850,7 @@ VacuumStmt: VACUUM opt_full opt_freeze opt_verbose
n->analyze = false;
n->full = $2;
n->freeze_min_age = $3 ? 0 : -1;
n->scan_all = $3;
n->verbose = $4;
n->relation = $5;
n->va_cols = NIL;
@@ -5860,6 +5862,7 @@ VacuumStmt: VACUUM opt_full opt_freeze opt_verbose
n->vacuum = true;
n->full = $2;
n->freeze_min_age = $3 ? 0 : -1;
n->scan_all = $3;
n->verbose |= $4;
$$ = (Node *)n;
}