> [!ParallelBtreeScan] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lwlock_parallel_btree_scan.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>ParallelBtreeScanLock</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Scans/IndexScan">IndexScan</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 <b>Index Scan Coordination</b>. This lock is used by parallel workers to coordinate their progress through a B-tree index, ensuring each worker knows which leaf page to process next without redundant scanning.</td></tr></table>