> [!LogicalApplyMain] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_activity_logicalapplymain.png"></td><td><b>Wait Category</b></td><td>Activity</td></tr><tr><td><b>Mechanism</b></td><td><code>LogicalApplyMain</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/Network">Network</a>, <a href="Resources/CPU">CPU</a></td></tr><tr><td colspan="3"><b>Logical Data Underflow</b>. The Apply Worker is the primary engine on the subscriber side that receives decoded WAL changes and re-executes them as local SQL operations.</td></tr></table>