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Any other suggestions? Another analysis of the logs shows that varnish
vs other backends (CouchDB) I see an order of magnitude higher
percentage of 3 second connection times with varnish. <br>
<br>
Here's my varnish command options
<a class="moz-txt-link-freetext" href="http://friendpaste.com/1Zvj1XkX75eKqdzrJQZcfK">http://friendpaste.com/1Zvj1XkX75eKqdzrJQZcfK</a> and my sysctl changes
<a class="moz-txt-link-freetext" href="http://friendpaste.com/3lt3uhIm1NTNhrqGxvQEX6">http://friendpaste.com/3lt3uhIm1NTNhrqGxvQEX6</a> the sysctl on haproxy is
identical.<br>
<br>
If it makes a difference my VCL is pretty simple just with some header
rewrites, round robin for 8 backend servers, exclusions for certain
URI's and etc.<br>
<br>
Thanks again!<br>
<br>
-Joe<br>
<br>
<br>
On 12/22/09 4:45 PM, Joe Williams wrote:
<blockquote cite="mid:4B316817.1010902@joetify.com" type="cite">
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Michael,<br>
<br>
I've looked at it for a bit and see 0's across the board for the
connections between the two machines.<br>
<br>
To that end it looks like I rarely have above 500 connections into
varnish.<br>
<br>
-Joe<br>
<br>
<br>
On 12/22/09 3:24 PM, Michael Fischer wrote:
<blockquote
cite="mid:d002c4030912221524i3d1ec55ena2c8b6762be70437@mail.gmail.com"
type="cite">Are you seeing any increased TCP send queue lengths on the
haproxy side, or TCP receive queue lengths on the Varnish side?
(netstat -a) That might provide some clue as to what's going on.
<div><br>
</div>
<div>--Michael<br>
<br>
<div class="gmail_quote">On Tue, Dec 22, 2009 at 2:58 PM, Henry
Paulissen <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:h.paulissen@qbell.nl">h.paulissen@qbell.nl</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Have
a
look to the conntrack setting in the kernel (sysctl) on both sides.<br>
It could be that your conntrack is full (connectrack only exists if you
use<br>
iptables with netfilter_conntrack).<br>
<br>
Regards,<br>
Henry<br>
<br>
-----Oorspronkelijk bericht-----<br>
Van: <a moz-do-not-send="true"
href="mailto:varnish-misc-bounces@projects.linpro.no">varnish-misc-bounces@projects.linpro.no</a><br>
[mailto:<a moz-do-not-send="true"
href="mailto:varnish-misc-bounces@projects.linpro.no">varnish-misc-bounces@projects.linpro.no</a>]
Namens
Joe Williams<br>
Verzonden: dinsdag 22 december 2009 18:12<br>
Aan: <a moz-do-not-send="true"
href="mailto:varnish-misc@projects.linpro.no">varnish-misc@projects.linpro.no</a><br>
Onderwerp: Slow connections<br>
<br>
<br>
I am seeing a good amount (1/100) of connections to varnish (from<br>
haproxy) taking 3 seconds. My first thought was the connection backlog<br>
but somaxconn and listen_depth are both set higher than the number of<br>
connections. Anyone have any suggestions on how to track down what is<br>
causing this or settings I can use to try to aleviate it?<br>
<br>
Thanks.<br>
<br>
-Joe<br>
<br>
--<br>
Name: Joseph A. Williams<br>
Email: <a moz-do-not-send="true" href="mailto:joe@joetify.com">joe@joetify.com</a><br>
Blog: <a moz-do-not-send="true" href="http://www.joeandmotorboat.com/"
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<pre class="moz-signature" cols="72">--
Name: Joseph A. Williams
Email: <a moz-do-not-send="true" class="moz-txt-link-abbreviated"
href="mailto:joe@joetify.com">joe@joetify.com</a>
Blog: <a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.joeandmotorboat.com/">http://www.joeandmotorboat.com/</a>
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<pre class="moz-signature" cols="72">--
Name: Joseph A. Williams
Email: <a class="moz-txt-link-abbreviated" href="mailto:joe@joetify.com">joe@joetify.com</a>
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