From: Eric Wong <normalperson@yhbt.net>
To: unicorn list <mongrel-unicorn@rubyforge.org>
Cc: Troex Nevelin <list@mrtech.ru>
Subject: Re: Request queue length
Date: Sun, 6 Feb 2011 19:02:35 +0000 [thread overview]
Message-ID: <20110206190235.GA8794@dcvr.yhbt.net> (raw)
In-Reply-To: <4D4EAA23.2050802@mrtech.ru>
Troex Nevelin <list@mrtech.ru> wrote:
> Is there a way to get the number of requests that are currently awaiting
> to be executed by my rails app by unicorn?
>
> Or there is no queue in unicorn and I should look for this information
> somewhere in nginx or other front-end server?
The queue is in the kernel and controlled by the listen(2) syscall.
If you're in Linux, you can inspect this with Raindrops[1] or just
read the output of ss(8) or /proc/net/tcp. I don't know how to do
this in non-Linux kernels.
All TCP servers actually have this queue, so you can use ss(8),
/proc/net/tcp or raindrops to inspect this queue in nginx, too.
[1] http://raindrops.bogomips.org/
I've found this example surprisingly useful, too:
http://raindrops.bogomips.org/examples/linux-tcp-listener-stats.rb
--
Eric Wong
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next prev parent reply other threads:[~2011-02-06 19:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-06 14:03 Request queue length Troex Nevelin
2011-02-06 19:02 ` Eric Wong [this message]
2011-02-11 19:52 ` Troex Nevelin
2011-02-11 21:20 ` Eric Wong
2011-02-12 15:58 ` Troex Nevelin
2011-02-26 13:12 ` Troex Nevelin
2011-02-26 20:40 ` Eric Wong
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