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Add vacuum_freeze_table_age GUC option, to control when VACUUM should

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ignore the visibility map and scan the whole table, to advance
relfrozenxid.
This commit is contained in:
Heikki Linnakangas
2009-01-16 13:27:24 +00:00
parent 19afb4e805
commit 6587818542
16 changed files with 170 additions and 54 deletions
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9
src/include/commands/vacuum.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/commands/vacuum.h,v 1.83 2009/01/01 17:23:58 momjian Exp $
* $PostgreSQL: pgsql/src/include/commands/vacuum.h,v 1.84 2009/01/16 13:27:24 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@@ -122,6 +122,7 @@ typedef struct VacAttrStats
extern PGDLLIMPORT int default_statistics_target; /* PGDLLIMPORT for
* PostGIS */
extern int vacuum_freeze_min_age;
extern int vacuum_freeze_table_age;
/* in commands/vacuum.c */
@@ -135,9 +136,11 @@ extern void vac_update_relstats(Relation relation,
double num_tuples,
bool hasindex,
TransactionId frozenxid);
extern void vacuum_set_xid_limits(int freeze_min_age, bool sharedRel,
extern void vacuum_set_xid_limits(int freeze_min_age, int freeze_table_age,
bool sharedRel,
TransactionId *oldestXmin,
TransactionId *freezeLimit);
TransactionId *freezeLimit,
TransactionId *freezeTableLimit);
extern void vac_update_datfrozenxid(void);
extern bool vac_is_partial_index(Relation indrel);
extern void vacuum_delay_point(void);