From: Eric Wong <normalperson@yhbt.net>
To: unicorn list <mongrel-unicorn@rubyforge.org>
Subject: Re: Unicorn 3.3.1 "Too many open files" error in kgio_tryaccept
Date: Fri, 14 Jan 2011 02:47:53 +0000 [thread overview]
Message-ID: <20110114024753.GA2453@dcvr.yhbt.net> (raw)
In-Reply-To: <AANLkTi=xs0CmL58e2SdtzVYQeo8n8YMhLCuc+bf-27nk@mail.gmail.com>
ghazel@gmail.com wrote:
> On Thu, Jan 13, 2011 at 3:06 PM, Eric Wong <normalperson@yhbt.net> wrote:
> > ghazel@gmail.com wrote:
> > How does lsof output look for your workers?
>
> Hm. The workers seem to be at 80-90 file descriptors each. I did catch
> one at 787 (!) with mostly handles to a geoip database from the geoip
> gem, but they got collected pretty quickly. Perhaps that's the cause!
OK, that's a fairly likely cause of EMFILE.
A tip for geoip users:
Install the io-extra gem to get IO.pread. This allows you to reuse
the same file descriptor with geoip automatically between any number
of threads/processes without reopening it.
> > Does this happen with 3.3.0?
>
> I've only seen it once. If I manage to reproduce it I'll try with 3.3.0.
The 3.3.x series generates less garbage than previous versions, so
it could be causing the GC to run less frequently and increase
the chance of the GC failing to collect descriptors.
--
Eric Wong
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next prev parent reply other threads:[~2011-01-14 3:50 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 21:20 Unicorn 3.3.1 "Too many open files" error in kgio_tryaccept ghazel
2011-01-13 23:06 ` Eric Wong
2011-01-14 2:17 ` ghazel
2011-01-14 2:47 ` Eric Wong [this message]
2011-01-14 4:20 ` ghazel
2011-01-14 9:17 ` Eric Wong
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