Happy new year to all , I am using tomcat and JBoss.
Tomcat/5.0.26 mod_jk/1.2.26 Regards, 2009/12/29 Mark Thomas <ma...@apache.org> > On 29/12/2009 16:17, assan alhamoud wrote: > > Hello Mark , > > > > we are using apache Server version: Apache/2.2.11 (Unix) > > we use mod_jk.so module > > jboss-3.2.5 > > Tomcat5 > > and jrockit-jdk1.4.2_19 > > > > at your disposal if you need more information > > Are you using Tomcat or JBoss? > Tomcat version? > mod_jk version? > > Mark > > > > > Regards, > > Ghassan > > > > 2009/12/29 Mark Thomas <ma...@apache.org> > > > >> On 29/12/2009 15:21, assan alhamoud wrote: > >>> Hello All > >>> > >>> I have some questions and I hope to find answers about Load balancing > . > >>> > >>> 1- The first question , our DBA says that it not normal and no logic > to > >>> have several instances of tomcat server on the same machine with the > >> same > >>> configuration , is this correct ? > >> No. Your DBA is wrong. > >> > >>> 2- Each tomcat instance here can serve about 125 user , and I have more > >> than > >>> this number on the server I got alot of problems and usually the > >> instance > >>> hang , is there anyway to get better performance from tomcat. > >> That isn't a Tomcat problem, that is an application problem. The > >> solution is to fix/tune your application. > >> > >>> I am using now 3G memory for each instance and 120 for max_pool_size > >> and > >>> 750 maxThread > >> It isn't clear what the 125 users refers to. Is it concurrent requests, > >> is it concurrent sessions, is it concurrent users (assuming 1 concurrent > >> user == more than 1 concurrent request). From these numbers the > >> application seems very resource intensive. It does appear that it would > >> benefit from some tuning. > >> > >>> 3- The most critical issue I had , when one instance hangs , apache > >> hangs > >>> and then all the application hangs because apache keep trying to > connect > >> to > >>> the hanged instance , Is there any way to force apache to bypass the > >> hanged > >>> instance. > >> Yes. But since you haven't told us the Tomcat version, httpd version nor > >> how you are connecting httpd to Tomcat we can't tell you how to fix it. > >> > >>> 4- When instance of tomcat hangs , i forced to restart this instance ( > >>> tomcat server ) the problem is GC can not free memory anymore > >>> Is there anyway to solve the problem instead of restarting the > >> server. > >> Yes. Work out if you have a memory leak or need more memory than is > >> available. If it is a memory leak, fix it. If you need more memory > >> either allocate it or tune your app so it uses less. > >> > >>> 5- at last sometimes I found that the same action repeated many times > >> which > >>> means that apache sends the request more than one time to tomcat server > >>> ,could I have control over this behavior. > >> Maybe, maybe not. If this behaviour is initiated by the user agent you > >> need to manage this in your app. It could also be caused by the > >> fail-over mechanism, in which case I refer you to my answer to point 3 > >> above. > >> > >> Mark > >> > >> > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > >> For additional commands, e-mail: users-h...@tomcat.apache.org > >> > >> > > > > > > > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > -- وداعاً ميخائيل
