Hi alloops, there's a more trivial way for getting the JVM use server option, that is to say give the -server option to the java program while invoking (see your scripts catalina.bat)
I have an app running on the following config: - Windows 2000 Advanced server (Dual PIII 1GHz CPU with 4GB RAM) - IIS 5 - Tomcat 3.3 (NOT 3.3.x) - ISAPI redirector 1.2 (size = 128K) - JDK 1.3.1_09 - Oracle 8.1.7
Tomcat is locking up almost everyday. Log files show a lot of bad DB connections that cannot be reset. The app that I deployed gets connected to by about 130 - 140 users at peak times (which doesn't really seem to be that much.....).
Some advice that I received (not in the Tocat user forum) is the following : A) Confirm that TC uses "Server" version of JVM. (I presume this is the jvm.dll in the JAVA_HOME\JRE\BIN\SERVER folder?) I found the following line in the workers.properties : worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)bin$(ps)classic$(p s)jvm.dll
I changed it to : worker.inprocess.jvm_lib=$(workers.java_home)$(ps)jre$(ps)bin$(ps)server$(ps )jvm.dll
Is this the correct place to make TC 3.3 use "Server" version of JVM?
like for your first question this is not a directly related question about tomcat but a question regarding howto setup/tune options to your JVM....B) Set memory parameters -Xms and - Xmx to allocate TC more memory. I am not sure where to do this . . .:-0
I have seen in this forum previously that someone said it must be specified in the "start parameters" in the General Tab screen of the Tomcat Service properties. Is it possible to specify these parameters in the wrapper.properties file (which seem to be used by the Tomcat service for startup)?
What is the correct place to do this? Even registry perhaps . . . ?
Is this exact syntax correct for the Windows OS? -Xms128 -Xmx1024
java -help will give you any details...
I am not very experienced in using Tomcat and is hesitant to Upgrade to, sayI can't recommand you enough to look for JVM configurations tricks & to
, 4.1x. But if you reckon it maybe a better alternative, I will certainly
consider.
ask about changing your JVM. I think that BEA Jrockit or latest JVM from Sun could be good solutions...
Note that with BEA JVM the -option is deprecated , so leaving the default parameter (jrockit) is a good choice
HTH
Jerome
-- Auteur cahier du programmeur Java tome 2 - Eyrolles 10/2003 http://www.eyrolles.com/php.informatique/Ouvrages/ouvrage.php3?ouv_ean13=9782212111941
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