-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.189 2008/08/25 18:55:43 mha Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.190 2008/08/25 19:03:37 tgl Exp $ -->
<chapter Id="runtime-config">
<title>Server Configuration</title>
</indexterm>
<listitem>
<para>
- Sets the directory to store temporary statistics data in. This can be a
- path relative to the data directory or an absolute path. The default is
- <filename>pg_stat_tmp</filename>. Pointing this at a RAM based filesystem
- will decrease physical I/O requirements and can lead to increased
- performance. If this parameter is changed when the system is running,
- there is a small window of time until the new file has been written
- during which the statistics functions might return no information.
+ Sets the directory to store temporary statistics data in. This can be
+ a path relative to the data directory or an absolute path. The default
+ is <filename>pg_stat_tmp</filename>. Pointing this at a RAM based
+ filesystem will decrease physical I/O requirements and can lead to
+ improved performance.
+ This parameter can only be set in the <filename>postgresql.conf</>
+ file or on the server command line.
+ If this parameter is changed while the server is running, there is a
+ small window of time until the new statistics file has been written
+ during which the statistics functions might return no information.
</para>
</listitem>
</varlistentry>