On Thu, 2020-10-08 at 10:17 -0500, Don Seiler wrote: > I have a PG 12.4 read replica that we're using to offload short read-only queries from the primary. However this morning (and random other days/times, it seems), I see batches of these messages in > the replica PG log: > > FATAL: terminating connection due to conflict with recovery > > I have hot_standby_feedback enabled already, but looking further at this message, it isn't cancelling the transaction but rather terminating the connection entirely. This suggests perhaps that a > session is sitting "idle in transaction" for 30 seconds (our max_standby_streaming_delay is at the default 30s)? Or that a group of sessions are "idle in transaction" and overlapping enough that > recovery is blocked for 30 seconds? What do you find in "pg_stat_database_conflicts"? Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com
