d><p>
         Sets the maximum number of workers that the system can support for
         parallel operations.  The default value is 8.  When increasing or
         decreasing this value, consider also adjusting
         <a class="xref" href="runtime-config-resource.html#GUC-MAX-PARALLEL-MAINTENANCE-WORKERS">max_parallel_maintenance_workers</a> and
         <a class="xref" href="runtime-config-resource.html#GUC-MAX-PARALLEL-WORKERS-PER-GATHER">max_parallel_workers_per_gather</a>.
         Also, note that a