Java String intern(): Performance impact

java.lang.String#intern() is an interesting function in Java. When used at the right place, it has potential to reduce overall memory…

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In which region intern strings are stored?

intern() is an interesting function in java.lang.String object. intern() function eliminates duplicate string objects from the application and has potential…

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Garbage Collection CPU Statistics

When a Garbage Collection event runs, it spends a predominant amount of its time in the Java application layer. It…

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JVM c1, c2 compiler thread – high CPU consumption?

c1, c2 compiler threads are created by Java virtual machine to optimize your application’s performance. Occasionally these threads will tend…

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Troubleshooting HTTP 502 bad gateway in AWS EBS

The application that we are going to discuss in this post was running on Elastic Beanstalk (EBS) service in Amazon…

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Java class loading – performance impact!

java.lang.ClassLoader#loadClass() API is used by 3rd party libraries, JDBC Drivers, frameworks, application servers to load a java class into the memory.…

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Java Hashtable, HashMap, ConcurrentHashMap – Performance impact

There are a good number of articles that articulate functional differences between HashMap, HashTable and ConcurrentHashMap. This post compares the…

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Java UUID generation – Performance impact

Java developers tend to use ‘java.util.UUID#randomUUID()’ API, to generate a UUID (Universally Unique Identifier) number (i.e., ‘b8bbcbed-ca07-490c-8711-5118ee0af2f9’). Under certain circumstances, using this…

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Garbage Collection tuning success story – reducing young gen size

When you tune Garbage collection performance, you are not only improving Garbage collection pause time but also the overall application’s…

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