tomcat out of memory

[Michael Sig Birkmose]

Hi everyone!

I am running a FreeBSD 4.8 server with jdk1.3 and tomcat 4.06 and I occours
quite often when using my servlets I get theexception:
java.lang.OutOfMemoryError:

My servlets are not very heavy, and top shows me that the is 71M inactive
mem + 43M free + 1024M free swap space.
My server has 512M ram..

Any input on what could be going wrong? Could I have told java not to use
enough memory somehow?