> [!info] ReplicationSlotsyncMain > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_activity_replicationslotsyncmain.png"></td><td><b>Wait Category</b></td><td>Activity</td></tr><tr><td><b>Mechanism</b></td><td><code>ReplSlotSyncMain</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>Standby Slot Alignment</b>. The replication slot sync worker is idling between synchronization cycles. This worker runs on the standby to pull logical slot states from the primary, ensuring bookmarks are identical during a failover. (Analogized by a focused red panda adjusting bookmarked ledgers based on coordinates received from a distance).</td></tr></table>