> [!XLogBuffer] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lwlock_wal_buffer.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>XLogBuffer</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Other/WAL">WAL Write</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 a <b>WAL Data Page</b>. This lock coordinates access to a specific page within the WAL buffers, ensuring that multiple backends can safely write their transaction logs into the shared memory buffer.</td></tr></table>