> From: Robinson, Eric [mailto:eric.robin...@psmnv.com] > Subject: RE: Showing Tomcat Memory Utilization with 'top' > > For example, I have a tomcat configured to use 96MB of heap (export > JAVA_OPTS="-ms96M -mx96M"). Top shows VIRT=336396, RES=227264. I'm > guessing that the 96MB of heap is buried in BOTH the VIRT and RES > numbers?
Since -Xms == -Xmx, that is normally true. However, the JVM may not have actually used all the allocated heap space, since the heap is internally divided into several regions (eg, eden, survivor, tenured), and some of these are further subdivided (TLAB). If a page in the heap hasn't been touched (not unusual for some TLAB areas), it will appear in VIRT but not in RES. - 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 unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
