| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: logical decoding / rewrite map vs. maxAllocatedDescs |
| Date: | 2018-08-13 14:49:46 |
| Message-ID: | 20180813144946.fn4zpdwpucx43emz@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2018-08-13 11:46:30 -0300, Alvaro Herrera wrote:
> On 2018-Aug-11, Tomas Vondra wrote:
>
> > Hmmm, it's difficult to compare "bt full" output, but my backtraces look
> > somewhat different (and all the backtraces I'm seeing are 100% exactly
> > the same). Attached for comparison.
>
> Hmm, looks similar enough to me -- at the bottom you have the executor
> doing its thing, then an AcceptInvalidationMessages in the middle
> section atop which sit a few more catalog accesses, and further up from
> that you have another AcceptInvalidationMessages with more catalog
> accesses. AFAICS that's pretty much the same thing Andres was
> describing.
It's somewhat different because it doesn't seem to involve a reload of a
nailed table, which my traces did. I wasn't able to reproduce the crash
more than once, so I'm not at all sure how to properly verify the issue.
I'd appreciate if Thomas could try to do so again with the small patch I
provided.
Greetings,
Andres Freund
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