ok, you know better :-) I just came accross this too, in case it helps the OP in anyway : http://developers.sun.com/sunstudio/articles/perfoptions.html (Jan 2007)
Also, it helps to check the code to see if there any circular object references. Pre-compiling JSPs either with Jasper of HttpUnit , also makes the app faster overall, in addition to other kinds of tuning. Use a performance analyzer to identify what parts of the code are taking up most of the memory. http://developers.sun.com/sunstudio/analyzer_index.html -Rashmi ----- Original Message ---- From: "Caldarale, Charles R" <[EMAIL PROTECTED]> To: Tomcat Users List <users@tomcat.apache.org> Sent: Thursday, March 15, 2007 1:18:32 PM Subject: RE: tomcat 5.5 > From: Rashmi Rubdi [mailto:[EMAIL PROTECTED] > Subject: Re: tomcat 5.5 > > "...For instance, running gc might take extremely long time. > In such case, it is advisable to reduce the heap size...." Urban myth, possibly true in the very early days of Java, when GC was not terribly sophisticated. > "...Until the memory size used for the JVM heap is lower than > the specified limit, the garbage collector does not perform > serious attempts to release memory...." The above sentence, as written, is obviously incorrect. Perhaps "while" was meant, rather than "until". The crux of the matter is the meaning of "serious attempts". HotSpot JVMs try to avoid a full GC if at all possible, since it's a rather expensive thing to do. Instead, small GCs are run on the Eden space, which for most applications, frees up 60% - 90% of the dead space. I would categorize these as serious, but perhaps not everyone would. - 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] ____________________________________________________________________________________ Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
