> [!AioIoUringExecution] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_aio_individual.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>io_uring</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Table/SeqScan">SeqScan</a>, <a href="Operations/Index/IndexScan">IndexScan</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>Kernel-Space I/O Bottleneck</b>. In the <code>io_uring</code> architecture, the database hands over entire batches of I/O operations to the kernel, which then uses its own pool of worker threads to fulfill them without requiring further intervention from the database process.</td></tr></table>