> [!WALWrite] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lwlock_wal_walwrite.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>WALWriteLock</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Tuple/ModifyTable">ModifyTable</a>, <a href="Operations/Distributed/Redistribute">Redistribute</a></td></tr><tr><td><b>Resources</b></td><td><a href="Resources/disk IO">disk IO</a>, <a href="Resources/CPU">CPU</a></td></tr><tr><td colspan="3"><b>Physical Durability Bottleneck</b>. While <code>WALInsert</code> handles the in-memory sequencing of records, <code>WALWrite</code> is the final serialization point before the data hits the physical storage subsystem.</td></tr></table>