Got it! My app is very read intensive so I try to cache lots of objects into the RAM. Therefore, I like to allocate more RAM to the heap since RAM is cheap now. Thanks for your advise!
Billy Peter Crowther wrote: > > On 5 February 2010 18:05, evebill8 <evebi...@hotmail.com> wrote: > >> Cool! I just want to confirm if the rule is right. My IT guy also does >> not >> believe it. >> >> It wasn't a bad rule of thumb as a place from which to start tuning when > typical server memory sizes were 0.5G to 2G - it reserved "sort-of enough" > RAM for the OS and the non-heap parts of Java and "sort-of enough" RAM for > the web application, though as you can imagine that varied quite a lot. > But > it could never really be said to be optimal, and ideally you'd always > measure and tune. > > These days, there's so much more RAM in most servers that tuning becomes > more relevant if the load's high. If your application is very heavy on > disk > reads, for example, you might do better to reduce its heap size in order > to > give the OS more space to cache disk pages. By contrast, I have one > *very* > heavy compute application (not directly a web app) that likes all the RAM > it > can get as heap memory to cache intermediate results in case they can be > re-used. > > - Peter > > -- View this message in context: http://old.nabble.com/Heap-size-rule-for-Tomcat-5.5-tp27463924p27481740.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
