Dear Amit, > Can't we use WaitLatch in the case of SHM_MQ_WOULD_BLOCK as we are > using it for the same case at some other place in the code? We can use > the same nap time as we are using in the leader apply worker.
I'm not sure whether such a short nap time is needed or not. Because unlike leader apply worker, parallel apply workers do not have timeout like wal_receiver_timeout, so they do not have to check so frequently and send feedback to publisher. But basically I agree that we can use same logic as leader. Best Regards, Hayato Kuroda FUJITSU LIMITED
