> [!ParallelWorkerMain] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_activity_parallel_worker.png"></td><td><b>Wait Category</b></td><td>Activity</td></tr><tr><td><b>Mechanism</b></td><td><code>ParallelWorkerMain</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Table/SeqScan">SeqScan</a>, <a href="Operations/ResultSet/HashJoin">HashJoin</a></td></tr><tr><td><b>Resources</b></td><td><a href="Resources/CPU">CPU</a></td></tr><tr><td colspan="3">A <b>Parallel Worker</b> is idling in its main loop. This state typically occurs during the very beginning or end of a query's lifecycle, as workers are spawned and detached.</td></tr></table>