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| author | Bruce Momjian <bruce@momjian.us> | 2005-07-30 15:45:49 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 2005-07-30 15:45:49 +0000 |
| commit | 2ab9997ec2ad1def54f6e0fe846f1838581fe8d3 (patch) | |
| tree | cfe86d1e0892459c23d7e4cf7f49eb1634106413 | |
| parent | 1f54d43075d8c457935cd9fe8adfea949104995d (diff) | |
| download | postgresql-2ab9997ec2ad1def54f6e0fe846f1838581fe8d3.tar.gz postgresql-2ab9997ec2ad1def54f6e0fe846f1838581fe8d3.zip | |
Patch to mention cost-based delay in vacuum reference
Alvaro Herrera
| -rw-r--r-- | doc/src/sgml/ref/vacuum.sgml | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/src/sgml/ref/vacuum.sgml b/doc/src/sgml/ref/vacuum.sgml index e020c9a9acd..1c90fe4ef1b 100644 --- a/doc/src/sgml/ref/vacuum.sgml +++ b/doc/src/sgml/ref/vacuum.sgml @@ -1,5 +1,5 @@ <!-- -$PostgreSQL: pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.36 2004/12/02 19:28:48 tgl Exp $ +$PostgreSQL: pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.37 2005/07/30 15:45:49 momjian Exp $ PostgreSQL documentation --> @@ -174,6 +174,15 @@ VACUUM [ FULL | FREEZE ] [ VERBOSE ] ANALYZE [ <replaceable class="PARAMETER">ta to occupy less disk space. <command>VACUUM FULL</command> will usually shrink the table more than a plain <command>VACUUM</command> would. </para> + + <para> + During <command>VACUUM</command> execution, there can be a substantial + increase in I/O traffic, which cause poor performance for other active + sessions. Therefore, it is sometimes advisable to use + the cost-based vacuum delay feature. See <xref + linkend="runtime" endterm="runtime-config-resource-vacuum-cost"> for more + details. + </para> </refsect1> <refsect1> @@ -229,6 +238,7 @@ VACUUM <simplelist type="inline"> <member><xref linkend="app-vacuumdb" endterm="app-vacuumdb-title"></member> + <member><xref linkend="runtime" endterm="runtime-config-resource-vacuum-cost"></member> </simplelist> </refsect1> </refentry> |