> [!AutoFile] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_lw_autofile.png"></td><td><b>Wait Category</b></td><td>LWLock</td></tr><tr><td><b>Mechanism</b></td><td><code>AutoFileLock</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Other/FunctionScan">FunctionScan</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">Synchronization stall in the <b>Persistent Configuration Layer</b>. The <code>ALTER SYSTEM</code> command allows users to modify server settings from within a SQL session, writing those changes to a dedicated configuration file that takes precedence over the standard <code>postgresql.conf</code>.</td></tr></table>