Thanks everyone!
I really appreciate all your ideas and input and experience!
I still am not completely clear on eden, gen, etc - obviously I need to go research how memory allocation is done in java.
But, after setting the maxPermSize, I was able to log in and do work on >18 sites which is more than I could do before :)
We will be scheduling some load testing next week to see if 128 is the right number for our real life problem, but at least I can see the light at the end of the tunnel now!
thank you all again for all your help!
At 10:35 AM 4/21/2005, you wrote:
yup you're right, silly me. ignore my brain dead remark.
as long as the problem gets solved, I don't mind looking stupid. so it would appear by setting the PermSize, the jvm is pushing all java.lang.Class instances to Perm rather than loading them in eden and then promoting them to tenured. If you run verbosegc again, the gc interval should be longer than previous settings. I can't think of any real trade-offs of setting Perm to 128 other than using more RAM.
If I remember correctly Perm is also where static stuff goes.
peter
On 4/21/05, Caldarale, Charles R <[EMAIL PROTECTED]> wrote: > > From: Peter Lin [mailto:[EMAIL PROTECTED] > > Subject: Re: OutOfMemoryError - 100 thread limit? > > > > I'm just guessing here, but by forcing the maxPermSize to 128, it > > leaves more space for the eden and prevents classes from getting > > promoted to perm. > > I think you're confusing tenured with perm. Nothing is ever promoted to > perm - only known long-lived objects (primarily instances of > java.lang.Class) are allocated in there, and no objects ever migrate to > or from perm space. Regular objects are normally allocated in eden > space (young gen), and if they live long enough, are migrated to the > tenured area (old gen) during a GC. > > Increasing the perm size actually reduces, not increases, the amount of > eden space available since the total of all three generations (young, > old, perm) must come from the -Xmx setting. > > - 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: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
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