Re: Auto-vacuum timing out and preventing connections

On Fri, Jul 1, 2022 at 9:11 PM Andres Freund <andres(at)anarazel(dot)de> wrote:

> Hi,
>
> On 2022-06-27 14:38:21 -0600, David Johansen wrote:
> > We're running into an issue where the database can't be connected to. It
> > appears that the auto-vacuum is timing out and then that prevents new
> > connections from happening. This assumption is based on these logs
> showing
> > up in the logs:
> > WARNING: worker took too long to start; canceled
> > The log appears about every 5 minutes and eventually nothing can connect
> to
> > it and it has to be rebooted.
>
> How many databases, tables and functions do you have?
>

1 database
427 tables
1 function

> > What can we do to diagnose this problem and get our database working
> > reliably again?
>
> Downthread you said you're on RDS - unfortunately you're going to have
> quite
> limited access and are going to have to take it up with AWS.
>

Yes, I definitely understand that AWS will likely need to be involved or
resolve this issue, but as I said previously, I'm trying to be proactive
and just see what I could find.