> From: Taylan Develioglu [mailto:tdevelio...@ebuddy.com] > Subject: Re: Effect of Heap Size on Performance? > > I think it also gives short-lived objects (for example short > sessions) a longer time to 'die out', so they won't be moved > to tenure because survivor space is increased and gc frequency > is decreased (can anyone confirm this?).
That is the expected effect of having a larger young generation and consequent larger eden and survivor spaces. However, there is a cost of deferring the migration of long-lived objects to tenured: they must be copied from one survivor space to the other on each minor GC, whereas once in tenured, they do not move until a full GC occurs (and perhaps not even then). It's often cheaper to throw hardware at a performance problem than to do the painstaking analysis of GC behavior and gain the few percentage points of improvement that will bring. - 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
