We have a problem with memory on SJSAS PE 8.2 update 4.
After few days of work the heap space is overflow. In attached screenshot presented how grow up usage of heap space.
May be anybody know what a problem here or can help me.

After that heap space usage reached 500-510 Mb (we have -Xmx512m option) server works some time still but then throws OutOfMemoryError.

OS: Linux ALT Master 2.4
JVM: Sun JVM 1.5.0_16