RE: mod_jk versus mod_proxy under load ?
-Original Message- From: news [mailto:[EMAIL PROTECTED] On Behalf Of Bill Barker Sent: Thursday, December 29, 2005 2:09 AM To: users@tomcat.apache.org Subject: Re: mod_jk versus mod_proxy under load ? One of our production servers recently started to suffer from very heavy performance troubles under load : the current setup is apache2 + mod_jk/ajp13 + tomcat5.0.25, jdk 1.4.2, 1GB (Xmx/Xms to 640MB) on a dual 2.4Ghz Xeon server. The maximum amount of requests/sec reached is around 15req/sec under production load, and I'd like to hit something between 30 and 40req/sec, unfortunately, mod_cache is not really an option for our current hosting company. You have an application problem, not a problem with Tomcat. I hit 23 requests per second on a uni-processor P4 3.0. Incidentally, if you look at my results you'll see that the average time for pages involving DB Access is 350ms, while the average time for pages not involving DB Access is 81ms. Here are some performance testing numbers for my app. http://www.mhsoftware.com/caldemo/manual/en/pageFinder.html?page=622.htm Note that my app is handcoded servlets, and doesn't involve JSP or tag libraries. You might want to upgrade to the latest JDKs. In my testing, going to the JDK 1.5 yielded something like a 25% increase in performance. George Sexton MH Software, Inc. http://www.mhsoftware.com/ Voice: 303 438 9585 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: mod_jk versus mod_proxy under load ?
-Original Message- From: news [mailto:[EMAIL PROTECTED] On Behalf Of Bill Barker Sent: Thursday, December 29, 2005 2:09 AM To: users@tomcat.apache.org Subject: Re: mod_jk versus mod_proxy under load ? One of our production servers recently started to suffer from very heavy performance troubles under load : the current setup is apache2 + mod_jk/ajp13 + tomcat5.0.25, jdk 1.4.2, 1GB (Xmx/Xms to 640MB) This will not limit the entire memory used by the process. Your Perm space is not limited by mx what so ever. Search for :Perm +java on google. You may already know this. on a dual 2.4Ghz Xeon server. The maximum amount of requests/sec reached is around 15req/sec under production load, and I'd like to hit something How many threads are allowed? What are you doing inside of your web pages? What technologies are you using? Have you profiled your application? Where are your bottleknecks? between 30 and 40req/sec, unfortunately, mod_cache is not really an option for our current hosting company. Then with mod_proxy: Proxy works good for different things. You can round robin or you can defer certain client requests to this or that server. We did this thing one time (no I didn't say at band camp) where we were able to push www.whatever.com/client1 */client2 */client3 to one server and */client4 */client5 and */client6 to this other server. That worked well at limiting traffic on the individual servers, but the scheme you go with depends on customer usage. The good part is the request to the user looks the same and goes to a single domain where as you use apache to split the requests off to other servers. I setup a separate Apache all together for the mod_proxy machine, so it wouldn't get bogged down and be a bottle kneck trying to do two things. Apache won't even try to process the request past where it is needing to be relayed depending on your processing rules in your conf file, so you can really move the load around with mod_proxy. I think for sessions and stuff to work right if you round robin you'll have to use clustering in tomcat or use some type of a database session store (depends then on will this become a bottle kneck). If you push this or that client here or there...depending on what you're doing clustering won't matter because the same users will be hitting the same server in the end. In either case you really can't use a mod_jk vs. mod_proxy mentality. They both will be working together. I may have missed something in the question though. Wade - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: mod_jk versus mod_proxy under load ?
I hate to take you off topic here but just in case you migth want to check this post out as well: *Re: About possible memory leak in Tomcat 5.x* Cheers and Gluck! On 12/26/05, Laurent Perez [EMAIL PROTECTED] wrote: Hello One of our production servers recently started to suffer from very heavy performance troubles under load : the current setup is apache2 + mod_jk/ajp13 + tomcat5.0.25, jdk 1.4.2, 1GB (Xmx/Xms to 640MB) on a dual 2.4Ghz Xeon server. The maximum amount of requests/sec reached is around 15req/sec under production load, and I'd like to hit something between 30 and 40req/sec, unfortunately, mod_cache is not really an option for our current hosting company. Are there available benchmarks comparing mod_jk and mod_proxy available, or resulting from anyone's personal experience ? I googled quite a bit and results are just random, someone will tell jk is faster, someone else will tell proxy is faster, so I'm looking for some advice on this TC list. Thanks for any input Laurent -- a href=http://in-pocket.blogspot.com;http://in-pocket.blogspot.com - Mobile world, technology and more/a - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
