Javarevisited

The java.lang.OutOfMemoryError: GC overhead limit exceeded is another type of OutOfMemoryError in Java which comes when JVM spent too much...

The difference between stack and heap memory is a c ommo n programming question a sked by beginners learning Java or any other programmin...

ThreadLocal variables are infamous for creating memory leaks. A memory leak in Java is the amount of memory hold by an object which is not...

Getting free memory , total memory and max memory on JVM is using Runtime class in Java. and many java programmers is interested to kn...

You can find JVM bit sizes like 32 bit or 64 bit by using either running java command from the command prompt or by using System.getProper...

For a senior Java developer, it's essential to know how JVM works and how to troubleshoot issues with respect to memory, most notably m...

The heap dump is a great source of information on identifying memory related issues on Java application e.g. web and application servers l...

You might be thinking, why should a Java developer read a book on Performance tuning? When I first faced this question a long time back, I ...

WeakReference and SoftReference were added   into Java API for a long time but not every Java programmer is familiar with it. This means th...

Though both -Xms and -Xmx JVM options are used to specify the size of heap memory, main difference between them is that -Xms is used to spe...

One of the rather new or latest Java interview question is, " What is the difference between 32-bit and 64-bit JVM? or, How do you cho...

I have read many articles on Garbage Collection in Java, some of them are too complex to understand and some of them don’t contain enough i...

This is a big topic to discuss as there are many approaches that involve analyzing the performance of an application starting from profilin...

Understanding when a class is loaded and initialized in JVM is one of the fundamental concepts of Java programming language. Thanks to Jav...

For a long time, one reason for me to update to the newer Java version was always bug fix and performance improvement. Apart from major cha...

I was getting "Invalid initial heap size: -Xms=1024M" while starting JVM and even after changing the maximum heap size from 102...

There are hundreds of JVM parameters or JVM Options exists inside sun JDK and its virtually impossible to keep track of every single J...

There are different JVM implementations available apart from popular Sun's (now Oracle) hotspot JVM like IBM's JVM. Now the quest...

We often need to find CPU and memory utilization of a particular Java process in order to get some performance stats, capacity planning or...

Java class loaders are used to load classes at runtime. ClassLoader in Java works on three principles: delegation , visibility,  and uniq...