Re: Autovacuum cancellation

"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

>> I think there's a window where the process waiting directly on
>> autovacuum could have already fired its deadlock check before it was
>> waiting directly on autovacuum.
>
> I think you don't understand what that code is doing. If there's an
> autovac anywhere in the dependency graph, it'll find it.

That'll teach me to try to read code from a patch directly without trying to
apply it or at least read the original source next to it. I thought I had seen
this code recently enough to apply the patch from memory -- clearly not.

I assume the right thing happens if multiple deadlock check signals fire for
the same autovacuum?

--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com