From: chris mckenzie <kristopolous-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>
To: Rainbows! list <rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org>
Subject: Re: Page request roundtrip time increases substantially after a bit of use
Date: Mon, 24 Jan 2011 17:14:04 -0800 (PST) [thread overview]
Message-ID: <443004.19531.qm@web63301.mail.re1.yahoo.com> (raw)
In-Reply-To: <20110125001107.GA1921-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
Hi Eric,
I'll prepare a more formal response in a bit, but here is my test run:
My rackup file for this is:
use Rack::ShowExceptions
use Rack::ShowStatus
map "/static/" do
run Rack::File.new(File.dirname(__FILE__))
end
My config file is:
pid "/tmp/my-pid.pid"
timeout 300
listen "*:7788", :backlog => 2048
stderr_path "/tmp/my-log.stderr.log"
stdout_path "/tmp/my-log.stdout.log"
worker_processes 10
Rainbows! do
use :ThreadSpawn
worker_connections 400
end
I have a static file, test.txt with the contents "Hello world"
After doing
rainbows -c config.rb rackup.ru
I then executed the shell script below:
#!/bin/tcsh
rm testrun
loop:
echo -n `/bin/date +%s.%N`," " >> testrun
curl -s -w "%{time_connect}, %{time_pretransfer}, %{time_starttransfer},
%{time_total}\n" $1 -o /dev/null >> testrun
goto loop
On the localhost, for some time.
The memory footprint remained flat.
The CPU usage did not spike noticeably
netstat -an did reveal some CLOSE_WAIT values on the ports but nothing that
hadn't previously been pointed out.
The (CSV) output of the test can be seen here:
http://qaa.ath.cx/single-request.csv.gz
For those of you without any visualization software, I made a rudimentary graph
from the data here:
http://qaa.ath.cx/single-request.png
You can clearly see how the delay increases and then doesn't ever go back down
to previous levels.
No web browser was running while this test was done and a grep -v on the stderr
revealed that no other request other then for the localhost was satisfied.
I'll research answers to your previous questions now. Thanks for looking into
this!
~chris.
----- Original Message ----
From: Eric Wong <normalperson-rMlxZR9MS24@public.gmane.org>
To: Rainbows! list <rainbows-talk-GrnCvJ7WPxnNLxjTenLetw@public.gmane.org>
Sent: Mon, January 24, 2011 4:11:07 PM
Subject: Re: Page request roundtrip time increases substantially after a bit of
use
Eric Wong <normalperson-rMlxZR9MS24@public.gmane.org> wrote:
> chris mckenzie <kristopolous-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> wrote:
> > On the machine running rainbows if I do a netstat, I get this:
> >
> > tcp 1 0 10.10.192.12:7788 10.10.131.165:17443
>CLOSE_WAIT
> > tcp 1 0 10.10.192.12:7788 10.10.131.165:17352
>CLOSE_WAIT
> > tcp 1 196 10.10.192.12:7788 10.10.131.165:17317
>CLOSE_WAIT
> > tcp 1 196 10.10.192.12:7788 10.10.131.165:17310
>CLOSE_WAIT
>
> ^ Strange that Send-Q is 1 across all those connections..
>
> Did you see the machine/connection that ran curl in there? How does
> hitting Rainbows! from localhost work?
One more thing, do you use Thread#{kill,exit,terminate}! or anything
that would prevent an ensure statement from firing and calling IO#close
on the client socket?
--
Eric Wong
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Do not quote signatures (like this one) or top post when replying
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next prev parent reply other threads:[~2011-01-25 1:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-24 21:03 Page request roundtrip time increases substantially after a bit of use chris mckenzie
[not found] ` <571697.98064.qm-oNR6tK37MtiB9c0Qi4KiSlZ8N9CAUha/QQ4Iyu8u01E@public.gmane.org>
2011-01-24 21:54 ` Eric Wong
[not found] ` <20110124215440.GA25489-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2011-01-25 0:11 ` Eric Wong
[not found] ` <20110125001107.GA1921-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2011-01-25 1:14 ` chris mckenzie [this message]
[not found] ` <443004.19531.qm-9Fhxc66Fx5iB9c0Qi4KiSlZ8N9CAUha/QQ4Iyu8u01E@public.gmane.org>
2011-01-25 2:02 ` Eric Wong
2011-01-25 2:55 ` chris mckenzie
[not found] ` <288407.18061.qm-oNR6tK37MtiB9c0Qi4KiSlZ8N9CAUha/QQ4Iyu8u01E@public.gmane.org>
2011-01-25 3:50 ` Eric Wong
[not found] ` <20110125035048.GA8124-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2011-01-25 21:38 ` Eric Wong
[not found] ` <20110125213835.GA9421-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2011-02-03 2:54 ` Eric Wong
[not found] ` <20110203025415.GA3812-yBiyF41qdooeIZ0/mPfg9Q@public.gmane.org>
2011-02-03 4:44 ` chris mckenzie
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