What is garbage collection in Weblogic?
Memory management, known as “garbage collection” is the process of clearing “dead” objects from the heap, thus releasing that space for new objects.
Which method is used to perform garbage collection?
The gc() method is used to invoke the garbage collector to perform cleanup processing. The gc() is found in System and Runtime classes.
What is garbage collection What is the difference between garbage collection and finalize () method?
gc() cleans up memory, and uses finalize() to get rid of the individual objects. Show activity on this post. Garbage collector is invoked by calling the System. gc() method on any class.
What is XMS and XMX in WebLogic?
Xmx – is the max size of the heap. Xms – is the initial size of the heap.( give it the same as Xmx ) XX:MaxPermSize – is is used to hold reflective of the VM itself such as class objects and method objects ( it’s independent from the heap size,, give it the 1/3 to 1/4 of the Xms size depend in your classes size)
What is heap in WebLogic?
Java objects reside in an area called the heap. The Heap is created when the JVM starts up and may increase or decrease in size while the application runs. When the heap become full, objects that are no longer used are cleared, thus making space for new objects.
What does system GC () and Runtime GC () methods do?
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. Usually, System gc is more convenient than Runtime gc.
How many types of garbage collectors are there in Java?
There are four types of the garbage collector in Java that can be used according to the requirement: Serial Garbage Collector. Parallel Garbage Collector. Concurrent Mark Sweep (CMS) Garbage Collector.
What is the difference between finally and finalize?
finally is the block in Java Exception Handling to execute the important code whether the exception occurs or not. finalize is the method in Java which is used to perform clean up processing just before object is garbage collected.