Hi, Dan. Thanks for replay. > he JVM is only going to accept one value for Xmx and Xms. Specifying the same options in JAVA_OPTS and CATALINA_OPTS would just be confusing.
As I says before - we have few Java-application on same machine. So - for them needs to set Xmx 1G, but for Tomcat - 4G. > Don’t set these as system variables. You’d want to define them in setenv.bat > Again, don’t set system variables for these. There’s no reason to set them system wide. Same reason - few Java-applications wich all need same Java_opts (exclude Tomcat). > Since you’re on Windows, you’re probably running as a service and that’s going to be a bit different No, Tomcat started via command line (rather - from .bat script wich call %catalina_home%/bin/startup.bat). 2014/1/27 Daniel Mikusa <dmik...@gopivotal.com> > On Jan 27, 2014, at 9:21 AM, Арсений Зинченко <setev...@gmail.com> wrote: > > > Hi. > > > > I'm sorry for so kindly question - but needs experts advice... > > > > We have a little dispute with my colleague about using this variables. > > > > So: have Windows-box machine. On it - runing few different > > Java-application, including Tomcat. > > > > Needs to set memory for Tomcat other, than for all other > Java-applications. > > > > My proposal is set to System variables: > > > > JAVA_OPTS "-Xmx1024M -Xms512M -XX:MaxPermSize512M" > > CATALINA_OPTS "-Xmx4096M -Xms2048M -XX:MaxPermSize=1024M” > > Don’t set these as system variables. You’d want to define them in > setenv.bat if you’re running from the command prompt or with the Windows > Service utility (either [1] or [2]), if you’re running as a service. > > > > > But, as he asserts - this is not correct way: > > > > > > - CATALINA_OPTS must NOT contain memory limits like "Xmx", "Xms" etc; > > There are no restrictions to what you can set in CATALINA_OPTS. You could > put your memory setting there if you wanted. Having said that, if you’re > running as a Windows service then you wouldn’t. You'd set your heap memory > settings through the service wrapper (either [1] or [2]). > > If you’re running from the console (not likely) or on Linux / Unix then > you’d set your heap settings in the setenv.sh|bat script. Again, you could > put memory settings in CATALINA_OPTS or in JAVA_OPTS. Setting them in > CATALINA_OPTS is generally a better choice though because settings in > CATALINA_OPTS are only applied when Tomcat is started. If you set them in > JAVA_OPTS then they’ll be applied when you start and stop the instance, > something you probably don’t want for your heap settings. > > > - Java Garbage collector will work differently because JAVA_OPTS have > > another opts for memory then CATALINA_OPTS, so - this will worse Tomcat > > performance; > > I’m not sure I follow your logic here. The JVM is only going to accept > one value for Xmx and Xms. Specifying the same options in JAVA_OPTS and > CATALINA_OPTS would just be confusing. > > > - and so on > > > > His suggestion is to set JAVA_OPTS with memory limits exactly to Tomcat > > startup script (not as system variable at all). > > Again, don’t set system variables for these. There’s no reason to set > them system wide. > > > > > So, my question is: is it correct to set memory limits for Tomcat via > > CATALINA_OPTS variable? > > Generally, but it depends on how you are starting Tomcat. Since you’re on > Windows, you’re probably running as a service and that’s going to be a bit > different. See above comments. > > > If in system also present JAVA_OPTS - will it have influence on to > Tomcat's performance? > > I think I answered this above. If it’s not clear, let me know. > > > > > Thanks. > > Dan > > [1] - > http://tomcat.apache.org/tomcat-7.0-doc/windows-service-howto.html#Command_line_parameters > [2] - > http://tomcat.apache.org/tomcat-7.0-doc/windows-service-howto.html#Tomcat7w_monitor_application > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
