> [!ParallelAppend] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lwlock_parallel_coordination.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>ParallelAppendLock</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Table/SeqScan">SeqScan</a>, <a href="Operations/ResultSet/Materialize">Materialize</a></td></tr><tr><td><b>Resources</b></td><td><a href="Resources/RAM">Memory</a>, <a href="Resources/CPU">CPU</a></td></tr><tr><td colspan="3">Contention on the <b>Parallel Partition Dispatcher</b>. In a parallel-aware plan targeting a partitioned table, the <code>Parallel Append</code> node manages a shared list of child relations.</td></tr></table>