| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andrew Dunstan <andrew(dot)dunstan(at)pgexperts(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: assertion failure 9.3.4 |
| Date: | 2014-04-21 19:38:03 |
| Message-ID: | 20140421193803.GB13906@alap3.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
On 2014-04-21 15:26:03 -0400, Tom Lane wrote:
> Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> > I spent the last two hours poking arounds in the environment Andrew
> > provided and I was able to reproduce the issue, find a assert to
> > reproduce it much faster and find a possible root cause.
>
> Hmm ... is this the same thing Josh is reporting? If so, why the
> apparent connection with use of pg_stat_statements? Maybe that
> just changes the timing to make the race condition more likely?
I am not sure. I could only reproduce the problem with both
stat_statements and auto_explain loaded, but I didn't try very
long. It's pretty timing sensitive, so I could very well imagine that
some additional overhead makes it easier to reproduce.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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