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?
depesz
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
