> [!MultiXactMemberSLRU] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lwlock_multixact_member_slru.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>MultiXactMemberSLRULock</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Other/Locking">Locking</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>Group Lock Registry</b>. This lock coordinates access to the SLRU cache pages that store the mapping of MultiXact IDs to their constituent transaction IDs (the "members").</td></tr></table>