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<chapter Id="runtime-config">

<title>Server Configuration</title>

This parameter can only be set in the <filename>postgresql.conf</>

file or on the server command line.

</para>

<para>

Note that even when this parameter is disabled, the system

will periodically launch autovacuum processes in order to

prevent transaction ID wraparound. See <xref

linkend="vacuum-for-wraparound"> for more information.

</para>

</listitem>

</varlistentry>