> [!WalReceiverMain] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_activity_walreceivermain.png"></td><td><b>Wait Category</b></td><td>Activity</td></tr><tr><td><b>Mechanism</b></td><td><code>WalReceiverMain</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/CPU">CPU</a>, <a href="Resources/Network">Network</a></td></tr><tr><td colspan="3"><b>WAL Receiver</b> on a standby server is idling. It means the receiver has established a connection to the primary and is currently waiting for new transaction data to arrive over the network.</td></tr></table>