> From: Peter Crowther [mailto:[EMAIL PROTECTED] > Subject: RE: Question about Tomcat context > > > From: Jerome Lepage - AKEROZ [mailto:[EMAIL PROTECTED] > > JAVA_OPTS="-XX:MaxPermSize=512m -Xms24m -Xmx512m"
For server environments, you usually want to set Xms to the same value as Xmx to avoid heap thrashing. Make sure you have enough RAM on the system to support not only the Java heap and PermGen spaces, but also the C heap, code space, and library/OS overhead. If you don't have enough RAM, you'll get into paging, and your performance will disappera. > > It's seems that tomcat have the memory but don't give to the > > différents contexts Heap memory is shared across all webapps, since they're all running in the same JVM; there's no way to provide separate heap space for each webapp. > I'm simplifying here - you're better off reading the JVM docs > or waiting for Chuck* to tell me I'm wrong ;-). Nothing wrong here. > Low free memory is not necessarily a problem - the > JVM may just be being lazy about garbage collection. Try using JConsole to watch the heap and PermGen while Tomcat's running; this will show if you are approaching a tight situation on memory space. (JVisualVM can also be used, but it's not as detailed.) - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
