dicating that
        the value of <a class="xref" href="runtime-config-resource.html#GUC-MAINTENANCE-WORK-MEM">maintenance_work_mem</a> should
        be used instead.  The setting has no effect on the behavior of
        <code class="command">VACUUM</code> when run in other contexts.
        This parameter can only be set in the
        <code class="filename">postgresql.conf</code> file or on the server command
        line.
       </p><p>
        For the collection of dead tuple identifiers, autovacuum i