Set tomcat (jvm) HeapSize in eclipse
1. Tomcat properties
2. Open Launch Configuration
3. Arguments
4. -Xms512m -Xmx2048m

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Set tomcat (jvm) HeapSize in eclipse
1. Tomcat properties
2. Open Launch Configuration
3. Arguments
4. -Xms512m -Xmx2048m

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PermGen space:Â OutOfMemoryError
After redeploying an application several times (in my case it was redeploy+Automation Tests running on TeamCity) - PermGen space “OutOfMemoryError” can occur.Â
[13:58:33]Checking for changes
[13:58:33]Collecting changes in 1 VCS root
[13:58:36]Call http://.../RPC2 buildAgent.runBuild: org.apache.xmlrpc.XmlRpcException: java.lang.Exception: java.lang.OutOfMemoryError: PermGen space
[13:58:36]Build canceledÂ
[Problem] To understand the cause for the java.lang.OutOfMemoryError: PermGen space, we should understand what this memory area is used for.
For practical purposes, the permanent generation consists mostly of class declarations loaded and stored into PermGen. This includes the name and fields of the class, methods with the method bytecode, constant pool information, object arrays and type arrays associated with a class and Just In Time compiler optimizations. From the above definition you can deduce that the PermGen size requirements depend both on the number of classes loaded as well as the size of such class declarations. Therefore we can say that the main cause for the java.lang.OutOfMemoryError: PermGen space is that either too many classes or too big classes are loaded to the permanent generation.Â
Please read more about PermGen memory here and here.
[Solution] Â
1. The solution is to add following arguments to JVM command line when your service is started:
-XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled -XX:+UseConcMarkSweepGCÂ
-XX:MaxPermSize=128M Â or 256/512/1024/...
On TeamCity It can be done in the next way:Â
Shut down the server
Modify  ./TeamCity/buildAgent/bin/agent.sh file with arguments described above
Restart the service.
Please find some more useful links:
https://www.redfin.com/devblog/2012/06/cmsclassunloadingenabled-at-redfin.htmlÂ
http://stackoverflow.com/questions/88235/dealing-with-java-lang-outofmemoryerror-permgen-space-error
http://www.jroller.com/agileanswers/entry/preventing_java_s_java_lang
http://www.integratingstuff.com/2011/07/24/understanding-and-avoiding-the-java-permgen-space-error/
https://wiki.eclipse.org/FAQ_How_do_I_increase_the_permgen_size_available_to_Eclipse%3F
Resolved: What causes PermGen OutOfMemoryError on JBoss? #programming #dev #answer
Resolved: What causes PermGen OutOfMemoryError on JBoss? #programming #dev #answer
What causes PermGen OutOfMemoryError on JBoss?
What is the underlying cause of a PermGen OutOfMemoryError in JBoss?
I am running JBoss AS 4.2.2 in my development environment, and this occurs after redeploying my web application a large number of times.
Christian Vest Hansen’s blog gives JVM options that help a lot, but do not solve the problem completely:
-XX:+UseConcMarkSweepGC…
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Fixed Dealing with "java.lang.OutOfMemoryError: PermGen space" error #dev #it #asnwer
Fixed Dealing with "java.lang.OutOfMemoryError: PermGen space" error #dev #it #asnwer
Dealing with "java.lang.OutOfMemoryError: PermGen space" error
Recently I ran into this error in my web application:
java.lang.OutOfMemoryError: PermGen space
It’s a typical Hibernate/JPA + IceFaces/JSF application running on Tomcat 6 and JDK 1.6.
Apparently this can occur after redeploying an application a few times.
Answer: Dealing with "java.lang.OutOfMemoryError: PermGen space" error
The…
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How to: Dealing with "java.lang.OutOfMemoryError: PermGen space" error
How to: Dealing with "java.lang.OutOfMemoryError: PermGen space"Â error
Dealing with "java.lang.OutOfMemoryError: PermGen space" error
Recently I ran into this error in my web application:
java.lang.OutOfMemoryError: PermGen space
It’s a typical Hibernate/JPA + IceFaces/JSF application running on Tomcat 6 and JDK 1.6.
Apparently this can occur after redeploying an application a few times.
Answer: Dealing with "java.lang.OutOfMemoryError: PermGen space" error
JRocki…
View On WordPress

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Memory usage, class and thread number comparison of Java application servers and applications with graphs will help you to find out suitable Java hosting product