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I use Postgresql+Pacemaker+Corosync cluster with 2 Postgresql instances in synchronous replication mode. Parameter “rep_mode” is set to "sync", and when I shut down the replica normal way, the primary node switches to the async mode. But when I shut down the replica by powering it off to emulate power unit failure, primary remains in sync mode and clients hang on INSERT operations until "pcs resource cleanup" is performed. I created an alert agent to run "pcs resource cleanup" when any node is lost, but this approach doesn’t work. What should I do to be sure the primary node will switch to async mode if the replica becomes lost for any cause? Best regards, Sergey Cherukhin
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