Thanks Everyone who responded. Just great. OK, looks like I got lot of home work to do now; if I were to summarize,
1. Need to get JDK and not JRE, latest version of JDK and use the "server" version 2. Look at the connector pool 3. Need to modify the heap size, with 12GB ram and NO other application running I will allocate 6GB ram as Max and Min for JVM. do I need to look at the server threads? if yes then where to I set that option? read somewhere tomcat with 8 thread (8 core processor), how do I configure that option? Thanks Bruce On Thu, Nov 19, 2009 at 3:54 AM, Christopher Schultz <ch...@christopherschultz.net> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Bruce, > > On 11/18/2009 9:48 AM, Bruce Foster wrote: >> I'm new to the list and tomcat. > > Welcome! > >> I have a web application deployed in tomcat 6. this application is >> quite CPU hungry and I would like to optimise the tomcat accordingly. >> >> I'm expecting to have 200 concurrent connections to the server at >> peak, not much for a standard web application but ours is imagery >> based and bit resource hungry. > > Can you be more specific about what resources your webapp is hungry for? > > If a typical request needs 10MiB of memory to process an image, then > you'll need to make sure that 50MiB * 200 requests = 10GiB of heap space > is available to your webapp. > > Can your webapp handle 200 simultaneous requests? Consider using a > load-testing tool such as JMeter to see how your webapp performs under > load. Watch heap usage (in the JVM! 'Task Manager' is not useful, here), > CPU utilization, disk usage, etc. to see what appears to be your > limiting resource(s) and then tackle those. > > You already know the number of concurrent requests you are expecting at > peak (200), so you have sort of set that requirement already (though I > might allocate 225 or 250 just in case you get some bursts in there). > > Memory (and GC behavior) is really the only thing you can tune at the > JVM level. Generally speaking, more heap space is better if you're going > to need it. Also, setting the min and max heap sizes to the same values > will avoid heap re-sizing which just wastes time if you know you want > that memory dedicated to the heap anyway. > > Hope that helps, > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.10 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAksEUPEACgkQ9CaO5/Lv0PBqMwCfaTsem7ypj+aPTloqlDDKGI69 > zXQAn1UjW0kB5q3RvppuLCjRwT9CJ6YT > =t0x1 > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- Thanks Bruce NSW Australia --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
