> [!WALBootstrapWrite] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_walbootstrapwrite.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>initdb</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>Initial Log Stream Barrier</b>. It represents the first physical bytes being handed to the kernel to establish the cluster's transaction lineage.</td></tr></table>