MEMORY WASTED BY SPRING BOOT APPLICATION

One of the widely wasted resources in the world today is: Memory. Due to inefficient programming, surprising (sometimes ‘shocking’) amount of memory is wasted. We see this pattern repeated in several enterprise applications. To prove this case, we conducted a small study. We analyzed the famous spring boot pet clinic application to see how much memory it is wasting. This application has been designed by the community to show how the spring application framework can be used to build simple but powerful database-oriented applications.

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HOW MUCH MEMORY IS MY APPLICATION WASTING?

In early 1970s 1 MB was costing 1 million $. Now 1 mb is costing fraction of that cost. There is no comparison. This is one of the reasons why engineers and enterprises don’t worry about memory any more. 1 million $ in 1970s might be equivalent of several millions of dollars’ worth today. Thus, back in the day’s memory was treated so preciously. This preciousness has been vividly described in the book ‘Idea Man’ – autobiography of Paul Allen (Microsoft Co-founder). Paul Allen talks about the challenge he and Bill Gates faced in writing BASIC programming language (Microsoft’s very first product) under 4 KB.

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WHAT HAPPENS BEHIND THE SCENE – FINALIZE() METHOD?

“What is the purpose of finalize() method?” is one of the often asked Java interview questions. The typical answer to it is: “Usual purpose of finalize() method is to perform cleanup actions before the object is discarded”. However, behind the scene, finalize() method are handled in a special way. A small mistake in finalize() method has the potential to jeopardize entire application’s availability. Let’s study it in detail.

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