On Fri, Aug 22, 2025 at 08:39:21AM -0700, Adrian Klaver wrote: > On 8/22/25 08:30, hubert depesz lubaczewski wrote: > > On Fri, Aug 22, 2025 at 11:21:22AM -0400, Tom Lane wrote: > > > hubert depesz lubaczewski <depesz@xxxxxxxxxx> writes: > > > > I got repeatable case today. Is is breaking on its own everyy > > > > ~ 5 minutes. > > > > > > Interesting. That futex call is presumably caused by interaction > > > with some other process within the standby server, and the only > > > plausible candidate really is the startup process (which is replaying > > > WAL received from the primary). There are cases where WAL replay > > > will take locks that can block queries on the standby. Can you > > > correlate the delays on the standby server with any DDL events > > > occurring on the primary? > > > > Nope. Plus there is certain repetition of these cases, so even if I'd > > miss *some* create table/alter, it just isn't going to be happening > > every 4-5 minutes. > > > > > So, while there are outliers, I'd say that most of the problems happens every > > 3-5 minutes. > > Are you using the Postgres community version or the AWS variant? Community. From pgdg repo. Best regards, depesz
