We have a Java application running on Centos 6.4 what we notice is that the RES is around 378M which is more than the allocated max that is 256M. Does this signify that the application is leaking? So far there is no GC happening yet but many YGC? What does this indicate?I don't do Java, but you do have two separate allocations to control: the heap, and the stack. Most JVM have command line parameters to control these.