httpd-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Craig Main <cm...@fnb.co.za>
Subject Re: [users@httpd] mod_proxy_ajp connections erratic
Date Thu, 23 Apr 2009 08:19:00 GMT
On Thu, 2009-04-23 at 10:07 +0200, André Warnier wrote:

> Craig Main wrote:
> > Thanks Andre, 
> > 
> > I am using apache to connect to 10 tomcat instances using the ajp
> > connector with load balancing and sticky sessions.
> > 
> > Apache: 
> > Load [root@lt-webportal-01:~]  # /opt/apache/bin/apachectl -V
> > Server version: Apache/2.2.9 (Unix)
> > Server built:   Sep  6 2008 15:33:44
> > Server's Module Magic Number: 20051115:15
> > Server loaded:  APR 1.3.0, APR-Util 1.3.0
> > Compiled using: APR 1.3.0, APR-Util 1.3.0
> > Architecture:   64-bit
> > Server MPM:     Prefork
> >   threaded:     no
> >     forked:     yes (variable process count)
> > Server compiled with....
> >  -D APACHE_MPM_DIR="server/mpm/prefork"
> >  -D APR_HAS_SENDFILE
> >  -D APR_HAS_MMAP
> >  -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
> >  -D APR_USE_SYSVSEM_SERIALIZE
> >  -D APR_USE_PTHREAD_SERIALIZE
> >  -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
> >  -D APR_HAS_OTHER_CHILD
> >  -D AP_HAVE_RELIABLE_PIPED_LOGS
> >  -D DYNAMIC_MODULE_LIMIT=128
> >  -D HTTPD_ROOT="/opt/http-2.2.9"
> >  -D SUEXEC_BIN="/opt/http-2.2.9/bin/suexec"
> >  -D DEFAULT_PIDLOG="logs/httpd.pid"
> >  -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
> >  -D DEFAULT_LOCKFILE="logs/accept.lock"
> >  -D DEFAULT_ERRORLOG="logs/error_log"
> >  -D AP_TYPES_CONFIG_FILE="/opt/etc/httpd/mime.types"
> >  -D SERVER_CONFIG_FILE="/opt/etc/httpd/httpd.conf"
> > 
> > Tomcat: apache-tomcat-6.0.18
> > 
> > Platform: CentOS 5.2 64bit
> > 
> > 
> > The problem points to the ajp connection as we have done the following
> > tests:
> > 
> > 1) Load tested http with our static content. - Good Response times
> > 2) Load tested with the tomcat ajp load balancing to 10 tomcat
> > instances:
> >         * When we test the site's static content, the speed is fine
> >         * When we test the site's pages that go to tomcat, we see the
> > same page returning sometimes fast, and other times slow.
> >         * If we test connecting to the tomcat via it's http connector
> > from the command line, the speed is fine under load.
> >         * If we test connecting to the apache requesting the tomcat
> > pages, some of the requests are returned quickly, others are slow.
> > 3) At first we thought it could be an specific instance of Tomcat, but
> > on investigation, one request to a particular instance was fast, and
> > others we slow to the same instance.
> > 
> > Please let me know if you need more information.
> > 
> I believe that will do fine.
> ;-)
> 
> Just another question, because someone is bound to ask : would it be an 
> option for you to test with mod_jk instead of mod_proxy_ajp as a 
> connector on the httpd side, and compare the results ?
> Not to say that one or the other is better, but mod_jk has been there 
> longer, and is probably more mature.  And it would help circumscribing 
> the issue.
> 

This is what we are currently looking into. Will let you know when we
have results on that.

Thanks
Craig



> ---------------------------------------------------------------------
> The official User-To-User support forum of the Apache HTTP Server Project.
> See <URL:http://httpd.apache.org/userslist.html> for more info.
> To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
>    "   from the digest: users-digest-unsubscribe@httpd.apache.org
> For additional commands, e-mail: users-help@httpd.apache.org
> 

To read FirstRand Bank's Disclaimer for this email click on the following address or copy
into your Internet browser: 
https://www.fnb.co.za/disclaimer.html 

If you are unable to access the Disclaimer, send a blank e-mail to
firstrandbankdisclaimer@fnb.co.za and we will send you a copy of the Disclaimer.

Mime
View raw message