Is this graphs are for normal performance or the app leaking the memory ?!!

Question

Hey there,
I'm new to java profiling and testing and I faced some hang ups so i made some fixes to my code .
It's medium sized application and i captured some shots of the Memory Heap, Memory GC, Threads/Loaded classes Graphs From NetBeans Profiler.
If any one may see them and say if this is normal performance or I need some more fixing in the come.
Note that the graphs are captured when I was doing Load Test on the program
The Memory Heap Graphs
http://islamelhosary.mufix.org/profiler/3.png
http://islamelhosary.mufix.org/profiler/4.png
http://islamelhosary.mufix.org/profiler/7.png
The Memory GC Graphs
http://islamelhosary.mufix.org/profiler/2.png
http://islamelhosary.mufix.org/profiler/5.png
http://islamelhosary.mufix.org/profiler/8.png
The Threads/Loaded classes Graphs
http://islamelhosary.mufix.org/profiler/1.png
http://islamelhosary.mufix.org/profiler/6.png
http://islamelhosary.mufix.org/profiler/9.pngThanks for your time
Islam El Hosary

Answer 1

It's always hard to tell if memory is leaking by graphs alone... of course if your memory graph is always increasing and never returning to some base value after GC, then you probably have a leak. You should use a tool like JProfiler on your app server to watch for leaks from a particular application (object within some app). But, in general... watch all graphs Memory, Threads, and CPU usage for abnormal trends. An app can also leak via over usage of resources (spawning threads that are never completing or never released).