PermGen out of memory !!??

[alex_enache]

Cheers everyone,

I have a small problem. After I deploy several times my project on the server, I get an error that sais something about the fact that PermGen is out of memory. Can anyone explain very shortly why does this happen and what can I do to not get this kind of behavior(because I hate restarting the jboss server everytime I get this error).

Thanks,
Alex

[pmuir]

http://docs.jboss.org/seam/latest-2.0/reference/en/html/gettingstarted.html#d0e2116

[wise_guybg]

This error occurs when the JVM runs out of space in the permanent generation heap. (first result from http://www.google.bg/search?q=PermGen)

In my C:\jboss-4.2.1.GA\bin\run.bat I have a line tuned like so:

set JAVA_OPTS=%JAVA_OPTS% -Xms128m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m

[alex_enache]

Great. I already see the difference. Thanks for your replies and sorry for not digging deeper into this before posting.

[csl]

You could use the jrockit VM for development, which doesn't have a perm gen space. Therefore this won't ever happen.

[monkeyden]

I tired the jrockit approach and it turned out to be dog slow. From what I saw, it appears as though they use the file system to compensate for the permgen space bug. I saw a lot more very large files in the server/default directory (I forget what the extension was). I could be wrong though.