Re: Streaming replica hangs periodically for ~ 1 second - how to diagnose/debug

On Thu, Aug 21, 2025 at 08:59:03AM -0700, Adrian Klaver wrote:
> Getting to the bottom of the bag of ideas:
> Have you looked at the OS system log for the time period involved?

Yes. Mostly dmesg. Nothing interesting logged around the time.

> You mentioned this seemed to involve PREPARE and DISCARD ALL.
> Is this the same set of statements or is it all over the place?

No. From what I can tell it's random sample.

> Also it would be helpful to know what bouncer you are actually using and
> what mode you are running in?

pgBouncer, version 1.23.1. As for more... mostly transaction pooling.
Applications go using transaction pooling, but people (dbas, ops) have
session pooling.

Best regards,

depesz