> [!SerialControl] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lwlock_ssi_individual.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>SerialControlLock</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Table/SeqScan">SeqScan</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"><b>SSI Lifecycle Management Bottleneck</b>. While <code>PredicateLockManager</code> handles the actual lock graph, <code>SerialControl</code> manages the high-level bookkeeping of which serializable transactions are currently active, committed, or aborted.</td></tr></table>