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From Dustin Chesterman <>
Subject [users@httpd] debugging mod_proxy performance with WireShark
Date Wed, 13 Oct 2010 15:58:02 GMT
Hey all-
  I wasn't sure if I posted this correctly since I did it before my
confirmation email from subscribing and it looked different in the
archives.  I'm looking for any ideas why my apache proxy would be causing
such a huge performance hit to our web app.  Thanks! :)

---------- Forwarded message ----------
From: Dustin Chesterman <>
Date: Tue, 12 Oct 2010 10:24:35 -0700
Subject: debugging mod_proxy performance with WireShark
Hi all-
  I am new to Apache httpd and have gotten about as far as I can debugging
some performance problems we are having on a machine.  It is a VM with
Fedora 13 installed. I am running a stand alone JIRA Tomcat installation on
port 8080 and running httpd with mod_proxy as a reverse proxy on the same
box.  If I remove the httpd layer and go directly to Tomcat the performance
is normal.  When I add the httpd layer it slows down overall and hangs
dramatically fairly often.  I installed Wireshark and have captured some
requests but I'm not really sure what I'm looking for.  How can I tell
what's going on in the time between some of the traffic going on?  I also
configured Flood but that doesn't seem to offer me any insight into what is
causing the problem either.  I'm likely not using these tools quite right
but I can't seem to find out what I should be looking for.

Here are my two VHosts.  I am redirecting to HTTPS also, but if I take that
layer out, it still has performance issues.

<VirtualHost *:80>
    RewriteEngine On
    RewriteCond %{HTTPS} off
    RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI}
<VirtualHost 192.168.XXX.XXX:443>
#<VirtualHost 192.168.XXX.XXX:80>
    ServerName 192.168.XXX.XXX
    ProxyRequests Off
    ProxyPreserveHost On
    SSLEngine On
    SSLCertificateFile /etc/httpd/ssl/jirassl-pem.crt
    SSLCertificateKeyFile /etc/httpd/ssl/jirassl.key
    ProxyPass / http://localhost:8080/
    ProxyPassReverse / http://localhost:8080/
    <Proxy *>
        Order deny,allow
        Allow from all

Any suggestions insight into where i can find info to help me learn to debug
issues with httpd in general would be greatly appreciated.

Thanks all
-Dustin Chesterman

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