Menu
Some of you probably know that some of core java APIs make explicit calls to System.gc(). I know two cases when this happens:
So, questions are:
518
gc() method runs the garbage collector. Calling this suggests that the Java Virtual Machine expend effort toward recycling unused objects in order to make the memory they currently occupy available for quick reuse.
gc() may do nothing, and that any code that "needs" the garbage collector to run is broken. However, the pragmatic reason that it is bad practice to call System. gc() is that it is inefficient.
System gc and Runtime gc are two methods to request JVM to run Garbage collector. The basic difference between System gc and Runtime gc in Java is that System gc is a class method while Runtime gc is an instance method.
System. gc() is what you call when you want Java's garbage compiler to run. It will run by itself every few minutes, but you can ask it to go whenever you want. When the garbage collector runs, it calls the finalize() method on each object that has no more reference.
RMI calls the System.gc() in case there are distributed objects which need to be cleaned up. You can make it perform GC less often or effectively turn it off.
You can avoid direct ByteBuffer needing a GC to clean them up on the Sun/Oracle JVM by calling
ByteBuffer bb = ByteBuffer.allocateDirect(SIZE);
((DirectBuffer) bb).cleaner().clean();
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
