On 17/05/2010 10:15, Pid wrote: > On 17/05/2010 09:56, Ozgur Ozdemircili wrote: >> Hi, >> >> -Rhel 5.3 x64 >> >> -java version "1.6.0_16" >> Java(TM) SE Runtime Environment (build 1.6.0_16-b01) >> Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode) >> >> -Apache tomcat 6.0.26 >> >> -Dual core Intel(R) Xeon(R) CPU E3110 @ 3.00GHz and 4 GB memory each. > > Each or 8Gb total? > >> On Mon, May 17, 2010 at 10:31 AM, Pid <p...@pidster.com >> >> On 17/05/2010 09:25, Ozgur Ozdemircili wrote: >> > Hi, >> > >> > I am having a lot of Java Heap OutOfMemory issues. The first >> change I did >> > was to add more memory to JVM: >> > >> > export CATALINA_OPTS="-XX:MaxPermSize=512m -Xms512m -Xmx2048m -server"
Also: I think the -server argument isn't necessary on a 64bit JVM. p > Seems OK. We usually recommend -Xms and -Xmx being set to the same size > so that the JVM doesn't have to keep resizing itself. > >> > Yet I have 2 questions >> > >> > - What are you real life configurations? In a very busy prod >> environment >> > what parameters do you use? > > The answer is entirely subjective. Unless we're running exactly the > same application, our settings are meaningless to you. > >> > - Checking the Current and Busy threads I have Current at 145 and >> Busy at 6, >> > is this normal? Shouldn`t Tomcat close unused threads? > > Depends what the Threads are doing. If they are not Tomcat connector > threads, then no. Do you have an Executor configured in server.xml? > >> > - After updating the server with "-XX:MaxPermSize=512m -Xms512m >> -Xmx2048m >> > -server" parameter although the Max mem should show 2048+512M it shows >> > 1820.50 MB. Any ideas why? > > Because you specified a range between min and max that the heap can > occupy, so the memory used is 512+(some resource stuff)+(a number > between 512 and 2048). > > > p > >> > Thank you for all the help. >> >> Please provide the exact OS, JVM and Tomcat versions you are using. >> >> Some clues about the server(s) architecture, memory available would also >> be useful. >> >> >> p >> >> > >
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