> [!DataFileSync] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_datafilesync.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>FileSync</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/ResultSet/Materialize">Materialize</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">This wait event represents the <b>Durability Barrier</b> for actual table and index data. While Write-Ahead Logs are synced on every commit, the actual data files are typically synced only during a checkpoint.</td></tr></table>