> [!VacuumTruncate] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_timeout_vacuumtruncate.png"></td><td><b>Wait Category</b></td><td>Timeout</td></tr><tr><td><b>Mechanism</b></td><td><code>VacuumTruncate</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/disk IO">disk IO</a>, <a href="Resources/CPU">CPU</a></td></tr><tr><td colspan="3"><b>Physical File Shrinkage Barrier</b>. After the <code>VACUUM</code> process has removed dead tuples and verified that the trailing pages of a table are entirely empty, it attempts to return that space to the Operating System.</td></tr></table>