On 2015-02-13 00:27:04 -0500, Tom Lane wrote:
> Two different CLOBBER_CACHE_ALWAYS critters recently reported exactly
> the same failure pattern on HEAD:
> http://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=markhor&dt=2015-02-06%2011%3A59%3A59
> http://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=tick&dt=2015-02-12%2010%3A22%3A57

Those are rather strange, yea.

Unfortunately both report a relatively large number of changes since the
last run...

> I'd say we have a problem.  I'd even go so far as to say that somebody has
> completely broken locking, because this looks like autovacuum and manual
> vacuuming are hitting the same table at the same time.

Hm. It seems likely that that would show up more widely.

Oddly enough other CLOBBER_CACHE animals, like
, that run more frequently have not reported a problem. Neither has
leech which IIRC runs on the same system...

One avenue to look are my changes around both buffer pinning and
interrupt handling...


Andres Freund

 Andres Freund                     http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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