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Ensure default-only storage parameters for TOAST relations 

to be initialized with proper values. Affected parameters are
fillfactor, analyze_threshold, and analyze_scale_factor.

Especially uninitialized fillfactor caused inefficient page usage
because we built a StdRdOptions struct in which fillfactor is zero
if any reloption is set for the toast table.

In addition, we disallow toast.autovacuum_analyze_threshold and
toast.autovacuum_analyze_scale_factor because we didn't actually
support them; they are always ignored.

Report by Rumko on pgsql-bugs on 12 May 2010.
Analysis by Tom Lane and Alvaro Herrera. Patch by me.

Backpatch to 8.4.
This commit is contained in:
Itagaki Takahiro 2010-06-07 02:59:02 +00:00
parent 3fd839950a
commit b5faba1284
3 changed files with 19 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
doc/src/sgml/ref/create_table.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/create_table.sgml,v 1.127 2010/05/13 18:54:18 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/create_table.sgml,v 1.128 2010/06/07 02:59:02 itagaki Exp $
PostgreSQL documentation
-->
@ -880,7 +880,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE <replaceable class="PAR
</varlistentry>
<varlistentry>
<term><literal>autovacuum_analyze_threshold</>, <literal>toast.autovacuum_analyze_threshold</literal> (<type>integer</>)</term>
<term><literal>autovacuum_analyze_threshold</> (<type>integer</>)</term>
<listitem>
<para>
Minimum number of inserted, updated, or deleted tuples before initiate an
@ -890,7 +890,7 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } ] TABLE <replaceable class="PAR
</varlistentry>
<varlistentry>
<term><literal>autovacuum_analyze_scale_factor</>, <literal>toast.autovacuum_analyze_scale_factor</literal> (<type>float4</>)</term>
<term><literal>autovacuum_analyze_scale_factor</> (<type>float4</>)</term>
<listitem>
<para>
Multiplier for <structfield>reltuples</> to add to

19
src/backend/access/common/reloptions.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/common/reloptions.c,v 1.34 2010/03/11 21:47:19 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/common/reloptions.c,v 1.35 2010/06/07 02:59:02 itagaki Exp $
*
*-------------------------------------------------------------------------
*/
@ -116,7 +116,7 @@ static relopt_int intRelOpts[] =
{
"autovacuum_analyze_threshold",
"Minimum number of tuple inserts, updates or deletes prior to analyze",
RELOPT_KIND_HEAP | RELOPT_KIND_TOAST
RELOPT_KIND_HEAP
},
-1, 0, INT_MAX
},
@ -177,7 +177,7 @@ static relopt_real realRelOpts[] =
{
"autovacuum_analyze_scale_factor",
"Number of tuple inserts, updates or deletes prior to analyze as a fraction of reltuples",
RELOPT_KIND_HEAP | RELOPT_KIND_TOAST
RELOPT_KIND_HEAP
},
-1, 0.0, 100.0
},
@ -1156,10 +1156,21 @@ default_reloptions(Datum reloptions, bool validate, relopt_kind kind)
bytea *
heap_reloptions(char relkind, Datum reloptions, bool validate)
{
StdRdOptions *rdopts;
switch (relkind)
{
case RELKIND_TOASTVALUE:
return default_reloptions(reloptions, validate, RELOPT_KIND_TOAST);
rdopts = (StdRdOptions *)
default_reloptions(reloptions, validate, RELOPT_KIND_TOAST);
if (rdopts != NULL)
{
/* adjust default-only parameters for TOAST relations */
rdopts->fillfactor = 100;
rdopts->autovacuum.analyze_threshold = -1;
rdopts->autovacuum.analyze_scale_factor = -1;
}
return (bytea *) rdopts;
case RELKIND_RELATION:
return default_reloptions(reloptions, validate, RELOPT_KIND_HEAP);
default:

4
src/bin/psql/tab-complete.c
View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2010, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.198 2010/04/07 03:51:19 itagaki Exp $
* $PostgreSQL: pgsql/src/bin/psql/tab-complete.c,v 1.199 2010/06/07 02:59:02 itagaki Exp $
*/
/*----------------------------------------------------------------------
@ -1172,8 +1172,6 @@ psql_completion(char *text, int start, int end)
"autovacuum_vacuum_scale_factor",
"autovacuum_vacuum_threshold",
"fillfactor",
"toast.autovacuum_analyze_scale_factor",
"toast.autovacuum_analyze_threshold",
"toast.autovacuum_enabled",
"toast.autovacuum_freeze_max_age",
"toast.autovacuum_freeze_min_age",