> [!SLRURead] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_slruread.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>SimpleLruReadPage</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Table/SeqScan">SeqScan</a>, <a href="Operations/ResultSet/NestedLoop">NestedLoop</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">That the database is waiting for <b>Transaction Metadata</b> to be read from disk. SLRUs are small, specialized caches used for binary status information.</td></tr></table>