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Re: Recent SIGSEGV failures in buildfarm HEAD

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Recent SIGSEGV failures in buildfarm HEAD
Date: 2006-12-28 15:24:54
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Lists: pgsql-hackerspgsql-patches
Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> writes:
> Tom Lane wrote:
>> Several of the buildfarm machines are exhibiting repeatable signal 11
>> crashes in what seem perfectly ordinary queries.

> no stack trace yet however impala at least seems to be running out of
> memory (!) with 380MB of RAM and some 800MB of swap(and no other tasks)
> during the regression run. Maybe something is causing a dramatic
> increase in memory usage that is causing the random failures (in impalas
> case the OOM-killer actually decides to terminate the postmaster) ?

No, most all the failures I've looked at are sig11 not sig9.

It is interesting that the failures are not as consistent as I first
thought --- the machines that are showing failures actually fail maybe
one time in two.

			regards, tom lane

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