why perm generation is continuously increasing?

[Li Li]

I got it. we use String.intern for temporary variables.
I used jmap -permstat and found that.
btw jmap -permstat will cause jvm hang and should be carefully used.
it hangs for a few minutes!

On Thu, Feb 16, 2012 at 6:55 PM, Li Li <fancyerii at gmail.com> wrote:

> hi all,
>     I found our application's perm generation size is continuously
> increasing and will reach 100%(we limit maxPermSize to 256MB) and perform a
> full gc(which will pause for 10s).after gc, perm size usage falls to  about
> 50% and again increasing. what kind of objects will be allocated to perm
> generation? we don't use reflection in our application.
>
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