permgen

Assuming a 64-bit JVM, is there any significant benefit to keeping MaxPermSize small? This is in the context of a Java EE application that is frequently redeployed, and has a classloader leak. As a medium-term workaround, it seems very reasonable to just bump up MaxPermSize to an absurd value - as long as it won't blow out the disk swap space. Because the undeployed app's code is nearly all unused (apart from that involved in the leak), it's paged out by the operating system. So the load on physical memory from undeployed detritus seems negligible; this has been verified by observing RSS (the

I am getting a PermGen Space Exception whenever I deploy my web application. I tried some JVm option in NetBeans but still unable to resolve the issue. Taylor Leese Add this JVM parameter: -XX:MaxPermSize=128m (or 256m or 512m ). Here's a related article as well that lists some other useful JVM options. 来源： https://stackoverflow.com/questions/1371683/how-to-handle-permgen-space-exception-in-tomcat

JVM内存溢出常见的有一下两种： 第一种：java.lang.OutOfMemoryError: PermGen space 第二种：java.lang.OutOfMemoryError: Java heap space 第一种异常原因是因为我们项目中需要加载的文件太多所导致，项目发布时class文件和jar文件会被加载到jvm的永久区，当永久区空间不足时则会抛出 java.lang.OutOfMemoryError: PermGen space； 第二种为堆栈溢出，此异常在项目运行其产生，由于运行期产生太多的对象实例而没有被gc,所以才会抛出该异常； 针对以上两种异常，和Tomcat使用情况的不同，有如下三种解决方案： 1 、Tomcat解压版 通过startup.bat脚本运行： 当我们通过startup.bat运行tomcat时，需要记事本catalina.bat并找到 echo Using CATALINA_BASE: "%CATALINA_BASE%"该行， 然后在上面添加 set JAVA_OPTS=%JAVA_OPTS% -server -Xms100m -Xmx1024m -XX:PermSize=20m -XX:MaxPermSize=100m 并将参数设置合理值。 2. Tomcat解压版 注册为系统服务 解压版注册为系统服务方式为，cmd 进入tomcat

I am using Tomcat for deploying a web application withe following PermGen configurations: JAVA_OPTS="-Djava.awt.headless=true -Dfile.encoding=UTF-8 -server -Xms1536m -Xmx1536m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=256m -XX:MaxPermSize=256m -XX:+DisableExplicitGC" Please I want to know the following: Is the whole memory used by Tomcat should be 256MB or Tomcat consumes other memory for other reasons ? How can I monitor the memory used by Tomcat to avoid reaching PemGen max size ? Also please be noticed that I have 3 Tomcats with the same previous PermGen configurations, running on

I am currently getting an java.lang.OutOfMemoryError: PermGen space . I am using Jetty and Linux Ubuntu. I have tried reading and attempting the different solutions that were provided in previous similar questions but I am not having any success. One similar question was Dealing with “java.lang.OutOfMemoryError: PermGen space” error But these solutions seem to be using Tomcat instead of Jetty. I keep getting the out of memeory error if I redeploy my service a few times. For example to test this I am going to my webapps folder and running touch *.xml to update the time stamp then re-run jetty

I have a very simple 'Hello world' type web application (Spring 3.2.1, Hibernate 4.1.9) on stopping/restarting the web-app Tomcat 7.0.26 The following web applications were stopped (reloaded, undeployed), but their classes from previous runs are still loaded in memory, thus causing a memory leak (use a profiler to confirm): /myapp I took the following steps: Started JVisualVM Right click on Tomcat and selected 'Heap Dump' Clicked on 'OQL Console' on the [heapdump] Ran this query: select x from org.apache.catalina.loader.WebappClassLoader x Found 4 instances of: org.apache.catalina.loader