Tricks & Tips

Programing Tips-4 Tips For Managing A Java Virtual Machine

4 Tips For Managing A Java Virtual Machine. The runtime engine of Java’s platform, Java Virtual Machine (JVM), runs programs written in Java, or in languages compiled into Java bytecode.

4 Tips For Managing A Java Virtual Machine

Programs compiled into bytecode can be executed on any environment with JVM installed on it. As a result, Java software is highly compatible with several computing platforms.

4 Tips For Managing A Java Virtual Machine.:

Advantages of Using JVM:

JVM offers many technical advantages for business owners.

  • Correctness: Produced with incredibly high standards, JVM software isn’t likely to include any errors.
  • Platform Independence: Any program compiled into Java bytecode can run on any computing platform with a Java Virtual Machine.
  • Security: Allow programmers to secure Java programs with built-in security features.

#Managing JVM:

Managing a JVM requires one to be a perpetual student. It’s an ongoing challenge that requires constant monitoring to keep applications adequately tuned that operate in a scalable manner. It involves assigning new objects and disposing of objects no longer in use. Here are 4 Tips For Managing a Java Virtual Machine:

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#Garbage Collection:

Garbage collection (GC) is far more complicated than it sounds. The secret is to craft an optimization path that allows you to change GC and simultaneously profile. There are there are four Java garbage collector algorithms, each slanted to different needs, to choose from. It’s crucial here to optimize your applications. Otherwise, you’ll have no idea what you need in the way of GC algorithms.

The Serial Collector, Parallel/Throughput collector, CMS collector, and the G1 collector are your GC choices. Learn to optimize your applications and learn your system thoroughly so you can identify the GC algorithm that will work most efficiently for you.

#Java Heap:

To keep up with the memory requirement, the Java memory heap plays an important part. Start with a small heap assignment and gradually increase it while continuing to test. Often problems are resolved by increasing the heap size but if there’s a lot of GC overhead, it may not help you, and it can make the application unnecessarily slow.

The idea of old generation vs. new generation objects comes into play here while trying to determine the right heap allocation. At the end of the day, heap size depends on liveset (the memory size of objects), old to new generation object ratio, and previous GC optimization.

#Core Application Optimization:

The best way to optimize your Java application is core code optimization. If the application isn’t playing well with the GC and heap optimization efforts, your best course of action is to focus on how your application processes data and structural changes.

With smart algorithm choices and careful handling of objects, you can eliminate most of your issues. Custom instrumentation can be used to get extra application-specific visibility via easy-to-use network monitoring software. You can also use a java agent to provide automatic tracing and metrics for the JVM-based languages later.

#Optimal Functions:

Java features functions to handle performance. There are several ways to handle optimization on a code level that you might find helpful:

  • Using StringBuilder as opposed to simple String, you’ll get better performance results.
  • Using StringBuilder as opposed to + operator.
  • Don’t use iterator().
  • Use Apache Commons Language as opposed to regular expressions.
  • Make full use of the stack.
  • Since recursions use a lot of resources, avoid using it.

In Conclusion

While this article merely scratches the surface of this complex subject, hopefully, it will point you in the right direction when it comes to managing a Java Virtual Machine. In being a patient, willing student, you will begin to understand how the different elements in Java interact so you can best learn how to analyze and optimize your code. And if you’re looking for more articles, tutorials, and hacks, be sure to check them out here.

References:

What is the JVM?
Java Agent
Apache Commons