Runtime.freeMemory() and Runtime.totalMemory() questions
OK, can someone verify my assumptions about these two methods and memory allocation in general. My assumptions are as follows, please tell me if they are correct or not:
totalMemory() should return the total amt of memory the JVM currently 'owns'. Some of this memory will be already allocated to objects, and some of it will be free for the creation of new objects.
freeMemory() should return the amount of memory the JVM 'owns'(totalMemory), that is not currently allocated to any objects.
totalMemory() minus freeMemory() should equal the amt of memory currently allocated to objects by the JVM.
Whenever freeMemory gets to a certain low point(possibly 0?), the JVM will request more memory from the system, thus increasing the totalMemory value.
OK, are all those statements correct?
So, is there any point at which the totalMemory value will reduce? I've seen it grow and grow, but I've never seen it reduce itself. In other words, will the JVM ever release memory back to the system?
Thanks.
