From: Eric Wong <normalperson@yhbt.net>
To: unicorn list <mongrel-unicorn@rubyforge.org>
Subject: Re: Combating nginx 499 HTTP responses during flash traffic scenario
Date: Fri, 30 Nov 2012 23:47:11 +0000 [thread overview]
Message-ID: <20121130234710.GA17300@dcvr.yhbt.net> (raw)
In-Reply-To: <20121129213017.GA925@dcvr.yhbt.net>
Eric Wong <normalperson@yhbt.net> wrote:
> Lawrence Pit <lawrence.pit@gmail.com> wrote:
> > A related question: is it possible to get insight in what's in the
> > unicorn queue and for how long requests have been queued there?
<snip>
> Using SystemTap (or similar solutions), I think the same information may
> be retrieved without modifying the Ruby process. I'm just starting my
> exploration of SystemTap, though...
With a little help from a SystemTap maintainer, I wrote a script
to get the TCP queue times easily.
The UNIX domain socket one is still pretty fragile (comments inline) but
appears to work:
http://mid.gmane.org/20121130223518.GA13976@dcvr.yhbt.net
If you're using an older SystemTap, you may need to swap cpu_clock_*(0)
with gettimeofday_*().
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next prev parent reply other threads:[~2012-11-30 23:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-29 17:44 Combating nginx 499 HTTP responses during flash traffic scenario Tom Burns
2012-10-29 18:45 ` Eric Wong
2012-10-29 19:27 ` Hongli Lai
2012-10-29 19:41 ` Eric Wong
2012-10-29 21:06 ` Hongli Lai
2012-10-29 21:53 ` Eric Wong
2012-10-29 22:21 ` Tom Burns
2012-10-30 20:40 ` Tom Burns
2012-10-30 21:37 ` Eric Wong
2012-11-02 17:59 ` Tom Burns
2012-11-02 19:38 ` Eric Wong
2012-11-03 22:45 ` Tom Burns
2012-11-05 11:48 ` Eric Wong
2012-11-06 3:16 ` Tom Burns
2012-11-06 21:23 ` Eric Wong
2012-11-29 15:52 ` Tom Burns
2012-11-29 20:30 ` Lawrence Pit
2012-11-29 20:57 ` Tom Burns
2012-11-29 21:30 ` Eric Wong
2012-11-30 23:47 ` Eric Wong [this message]
2012-11-29 20:41 ` Eric Wong
2012-12-04 3:00 ` Eric Wong
2012-11-29 21:19 ` Eric Wong
2012-11-29 21:55 ` [RFC/PATCH] check_client_connection: document local-only requirement Eric Wong
2012-11-29 23:47 ` Tom Burns
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