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" 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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