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Memory-Monitoring Tools Since Java 5, the standard JDK monitoring tool has been JConsole. The Oracle JDK also includes jStat, which enables the monitoring of memory usage and garbage-collector activity from the console, and Java VisualVM (or jvisualvm), which provides rudimentary memory analyzes and a profiler.
The easy way to monitor Heap usage is by using a commercial APM (Application Performance management tool) such as CA Wily APM, AppDynamics, New Relic, Riverbed, etc. APM tools not only monitor the heap usage, but you can also configure the tool to Alert you when Heap usage is not normal.
Check Computer Memory Usage EasilyTo open up Resource Monitor, press Windows Key + R and type resmon into the search box. Resource Monitor will tell you exactly how much RAM is being used, what is using it, and allow you to sort the list of apps using it by several different categories.
I want to run several REST web applications inside one Java process to save memory and scale easily with help of Akka. I would like to estimate how much memory each request handler consume and detect these dangerous for the entire system.
Is it possible to monitor memory usage in almost real time inside that process and find out how much memory is used be each request handler? What I need to achieve that? Are there any tools?
Is it possible to catch out of memory exception and based on memory usage do something, for example crash only request handlers exceeding assumed memory limit? If so, what could be bad with that?
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