OS Memory monitoring tool : perfmon or similar.But as soon as we complete, we should expect those objects should be destroyed/cleaned in next GC cycle. It is very logical, when we perform some task on application, it will load new class, create object and do the task. And, we can see the same generational changes of memory like as described in previous symptom. To ensure this symptom, we may perform force GC to see, if memory usages are going down then it is okay, if not, that means, it is constantly occupied. This may cause memory increment for new action perform on application. While running application with large number of user or data (typical stress test scenario), if we see memory is not released and for longer time observation, the memory is still occupied. This can lead to critical stage and cause Out of memory Exception. Some times, we can see the memory increases more and more like stepping up thread, even after GC memory consumption is still growing and we can see generational changes. (for Java/Dotnet a, force GC from profiler should be useful to judge if the objects are collected as soon as they are useless) And, we need to observe the new object that are created for those actions are removed from run time environment as soon as the functionality ended. Let’s say, if our actions on application working with large volume of data, it is logical to have memory increment.īut, we need to get, how much. We need to relate this with action that we perform with the application. While running application, if we see the system memory & application memory usages(heap+non heap) increases, that is clear indication the required memory is higher. Not necessary a memory increment will be a definite leak, but, logical relation between functionality and required memory can define if it is leak or not.īased on symptoms, I define memory leak in two categories. In generic way, when an application’s required memory increases while application is running, it might refers to memory leak. Actually, it has large impact in several type.
What is a memory leak?īy the name we can understand, it is about high memory consumption. I will try to avoid theoretical definitions, rather using my own way to express.
We will use Top Down approach so that we can actually see symptoms from outside of application to inside.įor this example, I will add reference on a java(j2ee) and a dotnet(Asp.Net/Web Forms) application. Some vendors will be supporting releases for longer than six months.In this article we are going to see generic ideas about memory leak detection technique.
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