> [!LockFileReCheckDataDirRead] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_lockfilerecheckdatadirread.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>RecheckDataDirLockFile</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>Runtime Identity Verification stall</b>. To prevent data corruption, Postgres processes periodically "re-read" the lock file on disk to confirm that they are still operating in the correct environment and that no other instance has maliciously or accidentally claimed the same directory.</td></tr></table>