What is your max heap set too, and what is the "typical" size of the heap following a forced garbage collection? If you find they vary widely (like you have 256 meg max heap, but typical heap sizes run 60-90 meg), perhaps you might consider reducing your max heap.
When you specify a large heap, java will dutifully fill it up, and then invoke a massive garbage collection event at the end. This results in sweeping through 256 meg of memory at once (just to get to the 60 meg that is actually used). It is both wasteful, and if the memory is on disk, very expensive. You might also want to play around with the size of the "young" generation and "eden". See the documentation located here: http://java.sun.com/docs/hotspot/ Mike On 6 Jun 2002 at 14:20, Rob Andres wrote: > Hmmm. I have about 120MB of free memory. > > Rob > > > "Michael Kirby" <[EMAIL PROTECTED]> wrote in message > news:[EMAIL PROTECTED]... > > How much free memory do you have? Every time we garbage collect, we > > are > going to > > traverse through ALL the memory in the heap. If any of it is paged > > out, > this will genereate a > > page fault. Some systems have aggressive paging algorithms, and if > > the > application isn't > > used (or the part of memory isn't used) it is paged out. I found > > that I > need at least 256 meg > > of free memory in my system before I run without page faults. > > Anything > less than that, then I > > am competing with the file system cache for free memory. > > > > Mike > > > > > > On 6 Jun 2002 at 10:03, Rob Andres wrote: > > > > > > Also, there seems to be an unordinary high number of Page > > > > Faults, which > > > slow > > > > down the whole system with all those Read/Writes from the > > > > Cache/RAM. > > > > I'm getting on average 36 per second, with a high of 62 and a > > > > low > > > > of 24. > > > That's > > > > with me not even in IDEA. I know these things aren't to do with > > > > Java, because I have other Java apps open that aren't giving me > > > > any Page Faults. > > > > > > > > Having run my system this morning for only 1 1/2 hours, I > > > > already have 500,000 Page Faults coming from IDEA. The next > > > > closest is at 150,000. > > > > > > > > --- > > [EMAIL PROTECTED] > > To obtain my PGP public key, mail "SEND PUB KEY" in the > > subject to "[EMAIL PROTECTED]" > > > > > _______________________________________________ > Eap-bugs mailing list > [EMAIL PROTECTED] > http://lists.jetbrains.com/mailman/listinfo/eap-bugs > --- [EMAIL PROTECTED] To obtain my PGP public key, mail "SEND PUB KEY" in the subject to "[EMAIL PROTECTED]" _______________________________________________ Eap-bugs mailing list [EMAIL PROTECTED] http://lists.jetbrains.com/mailman/listinfo/eap-bugs
