There are a few things that can get you: Make sure you have sufficient threads available for the mod_jk connector on the Apache side. Port 8009 by default. The default value is frighteningly low and not up to any real load.
Make sure that the machine has enough memory. That is the biggest issue that I encountered. As the number of connections mount, the amount of memory that both tomcat and apache need escalates very quickly. Once you get into swapping, you may as well pack up and go home. Tune the threads configuration in apache and your VM parameters carefully to avoid memory contention between apache and tomcat. My experience is that it is better to reduce the number of concurrent connections you can handle to avoid swapping. Gary Evesson Decentrix Inc -----Original Message----- From: Eqbal [mailto:[EMAIL PROTECTED] Sent: Thursday, April 19, 2007 2:27 PM To: Tomcat Users List Subject: RE: performance with apache and tomcat We will need to use SSL. What causes any performance overhead in using apache with Tomcat, considering they will be on the same server? --- Gary Evesson <[EMAIL PROTECTED]> wrote: > Unless of course you need mod_rewrite. We also > handle millions a day with > exactly this set up. > > Gary Evesson > Decentrix Inc > > -----Original Message----- > From: Leon Rosenberg > [mailto:[EMAIL PROTECTED] > Sent: Thursday, April 19, 2007 1:30 PM > To: Tomcat Users List > Subject: Re: performance with apache and tomcat > > unless you explicitely need the httpd I wouldn't put > it in front of > tomcat, since besides less performance and security > issues (last one > like a month (?) ago with mod_jk) it doesn't bring > you any benefits. > Without knowing your requests (duration, resources > they consume etc) > its hard to make any estimations at all, but > "normally" (whatever > normally is) and on fair hardware 40 requests a > second are easily > served by one tomcat. So you could set up two > machines with tomcats, > put the traffic on one of them and let your hw > loadbalancer perform > the failover to the spare machine if needed. > > regards > Leon > > P.S. There are indeed some real scenarios, where a > httpd in front > would be useful: down page, ssl, port 80 stress, but > since you have a > loadbalancer, it will be serving it much better as > httpd, so use your > lb features. > > On 4/19/07, Eqbal <[EMAIL PROTECTED]> wrote: > > Hello, > > > > We are planning on using Tomcat as the Servlet > > container for one of our production systems. I > would > > like to know if there are any performance issues > using > > it together with Apache webserver 2.0 and the ajp > > connector (using mod_rewrite). Is performance > expected > > to be better if we double up Tomcat as a webserver > and > > not use apache at all. > > I heard an opinion that using apache with tomcat > may > > mean worse performance? > > The site is a medium traffic site with about 800 > > concurrent users, about 40 hits per second. We > plan on > > using a hardware load balancer and we were not > > planning on putting the webserver outside the > > firewall, tomcat behind the firewall kind of > > configuration, so our webserver and app server are > on > > the same hardware (Suse Linux). Original idea was > to > > place static files on the webserver (apache 2.0) > and > > servlets/jsps on Tomcat. > > I appreciate any feedback. > > Is this list searchable somewhere on the web? So I > can > > search any pervious discussions on this topic? > > > > Thanks. > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > protection around > > http://mail.yahoo.com > > > > > --------------------------------------------------------------------- > > To start a new topic, e-mail: > users@tomcat.apache.org > > To unsubscribe, e-mail: > [EMAIL PROTECTED] > > For additional commands, e-mail: > [EMAIL PROTECTED] > > > > > > --------------------------------------------------------------------- > To start a new topic, e-mail: > users@tomcat.apache.org > To unsubscribe, e-mail: > [EMAIL PROTECTED] > For additional commands, e-mail: > [EMAIL PROTECTED] > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
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