ndwidth, and so forth as a query which
         uses no workers at all.
        </p><p>
         For more information on parallel query, see
         <a class="xref" href="parallel-query.html" title="Chapter 15. Parallel Query">Chapter 15</a>.
        </p></dd><dt id="GUC-MAX-PARALLEL-MAINTENANCE-WORKERS"><span class="term"><code class="varname">max_parallel_maintenance_workers</code> (<code class="type">integer</code>)
       <a id="id-1.6.7.7.7.2.6.1.3" class="indexterm"></a>
       </span> <a href="#G