> [!WalReceiverWaitStart] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_ipc_walreceiverwaitstart.png"></td><td><b>Wait Category</b></td><td>IPC</td></tr><tr><td><b>Mechanism</b></td><td><code>WalReceiver</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>Initial Replication Handshake Latency</b>. Before a standby can resume applying changes, it must successfully establish a network connection to the primary and agree on the starting LSN (Log Sequence Number).</td></tr></table>