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## Feature: Postgres stop timeout Switchover/Failover operation hangs on signal_stop (or checkpoint) call when postmaster doesn't respond or hangs for some reason(Issue described in [1371](https://github.com/zalando/patroni/issues/1371)). This is leading to service loss for an extended period of time until the hung postmaster starts responding or it is killed by some other actor. ### master_stop_timeout The number of seconds Patroni is allowed to wait when stopping Postgres and effective only when synchronous_mode is enabled. When set to > 0 and the synchronous_mode is enabled, Patroni sends SIGKILL to the postmaster if the stop operation is running for more than the value set by master_stop_timeout. Set the value according to your durability/availability tradeoff. If the parameter is not set or set <= 0, master_stop_timeout does not apply.