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Make autovacuum behavior more agressive, per discussion on hackers list

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--- was part of autovacuum default 'on' patch that was reverted, but we
want this part.

Peter Eisentraut
This commit is contained in:
Bruce Momjian 2006-09-02 23:12:16 +00:00
parent 946abc7c68
commit e0938c3f5b
3 changed files with 14 additions and 14 deletions
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10
doc/src/sgml/config.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.81 2006/09/02 23:04:20 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.82 2006/09/02 23:12:16 momjian Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
@ -3113,7 +3113,7 @@ SELECT * FROM parent WHERE key = 2400;
<para>
Specifies the minimum number of updated or deleted tuples needed
to trigger a <command>VACUUM</> in any one table.
The default is 1000.
The default is 500.
This parameter can only be set in the <filename>postgresql.conf</>
file or on the server command line.
This setting can be overridden for individual tables by entries in
@ -3131,7 +3131,7 @@ SELECT * FROM parent WHERE key = 2400;
<para>
Specifies the minimum number of inserted, updated or deleted tuples
needed to trigger an <command>ANALYZE</> in any one table.
The default is 500.
The default is 250.
This parameter can only be set in the <filename>postgresql.conf</>
file or on the server command line.
This setting can be overridden for individual tables by entries in
@ -3150,7 +3150,7 @@ SELECT * FROM parent WHERE key = 2400;
Specifies a fraction of the table size to add to
<varname>autovacuum_vacuum_threshold</varname>
when deciding whether to trigger a <command>VACUUM</>.
The default is 0.4.
The default is 0.2.
This parameter can only be set in the <filename>postgresql.conf</>
file or on the server command line.
This setting can be overridden for individual tables by entries in
@ -3169,7 +3169,7 @@ SELECT * FROM parent WHERE key = 2400;
Specifies a fraction of the table size to add to
<varname>autovacuum_analyze_threshold</varname>
when deciding whether to trigger an <command>ANALYZE</>.
The default is 0.2.
The default is 0.1.
This parameter can only be set in the <filename>postgresql.conf</>
file or on the server command line.
This setting can be overridden for individual tables by entries in

10
src/backend/utils/misc/guc.c
View File

@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.349 2006/09/02 23:04:20 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.350 2006/09/02 23:12:16 momjian Exp $
*
*--------------------------------------------------------------------
*/
@ -1564,7 +1564,7 @@ static struct config_int ConfigureNamesInt[] =
NULL
},
&autovacuum_vac_thresh,
1000, 0, INT_MAX, NULL, NULL
500, 0, INT_MAX, NULL, NULL
},
{
{"autovacuum_analyze_threshold", PGC_SIGHUP, AUTOVACUUM,
@ -1572,7 +1572,7 @@ static struct config_int ConfigureNamesInt[] =
NULL
},
&autovacuum_anl_thresh,
500, 0, INT_MAX, NULL, NULL
250, 0, INT_MAX, NULL, NULL
},
{
@ -1738,7 +1738,7 @@ static struct config_real ConfigureNamesReal[] =
NULL
},
&autovacuum_vac_scale,
0.4, 0.0, 100.0, NULL, NULL
0.2, 0.0, 100.0, NULL, NULL
},
{
{"autovacuum_analyze_scale_factor", PGC_SIGHUP, AUTOVACUUM,
@ -1746,7 +1746,7 @@ static struct config_real ConfigureNamesReal[] =
NULL
},
&autovacuum_anl_scale,
0.2, 0.0, 100.0, NULL, NULL
0.1, 0.0, 100.0, NULL, NULL
},
/* End-of-list marker */

8
src/backend/utils/misc/postgresql.conf.sample
View File

@ -363,13 +363,13 @@
#autovacuum = off # enable autovacuum subprocess?
#autovacuum_naptime = 60 # time between autovacuum runs, in secs
#autovacuum_vacuum_threshold = 1000 # min # of tuple updates before
#autovacuum_vacuum_threshold = 500 # min # of tuple updates before
# vacuum
#autovacuum_analyze_threshold = 500 # min # of tuple updates before
#autovacuum_analyze_threshold = 250 # min # of tuple updates before
# analyze
#autovacuum_vacuum_scale_factor = 0.4 # fraction of rel size before
#autovacuum_vacuum_scale_factor = 0.2 # fraction of rel size before
# vacuum
#autovacuum_analyze_scale_factor = 0.2 # fraction of rel size before
#autovacuum_analyze_scale_factor = 0.1 # fraction of rel size before
# analyze
#autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for
# autovac, -1 means use