> From: teoh [mailto:[EMAIL PROTECTED] > Subject: memory required to run webapp without outofmemory > > is just by looking at tomcat manager, we can find out maximum memory > required to run webapp without out of memory?
Not really - it's much more complicated. The JVM heap holds objects of all types, including those from each webapp, ones used by Tomcat, ones used by the JVM internally, etc. The heap itself is partitioned into various areas used for objects of different lifetimes, and garbage collections occur when an area fills. Looking at total heap usage at any given instant of time won't really tell you what portion of the usage depends on the number of requests that are being processed at that instant. Also, there's no guarantee that all requests will consume the same amount of heap resources. You generally want to configure the heap as large as you can without provoking page swapping. That will likely take some experimentation as well monitoring. JConsole provides a decent look at heap usage over time, but you'll really nead a profiler if you want detailed information about what your webapps are doing. A link you may find interesting: http://java.sun.com/javase/technologies/hotspot/gc/index.jsp - 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]
