> [!ReorderLogicalMappingRead] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_reorderlogicalmappingread.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>ReorderBuffer</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Distributed/Redistribute">Redistribute</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>Replication Reconciliation Delay</b>. To correctly reconstruct a transaction that has been partially spilled to disk, the engine must maintain an index (mapping) of which WAL records correspond to which spilled file segments.</td></tr></table>