eclipse-mat

I have got a large (5GB) hprof dump, created by application when OutOfMemoryError occurred. (Using XX: HeapDumpOnOutOfMemoryError ). Unfortunately there are no logs collected when this error happened. Re-creating this will take couple of hours. I was hoping if some tools could show the exception stack trace or all threads stacks etc from hprof. I am currently using MAT , could not see a way to get thread information. Which tool I could use? (I am not sure if hprof file has information about thread/location of call when OOM occurred). ( I do know to how to take thread dump in normal cases. The

In the process of tracking severe memory issues in my app, I looked at several heap dumps from my app, and most of the time I have a HUGE bitmap that I don't know of. It takes 9.4MB, or 9,830,400 bytes, or actually a 1280x1920 image at 4 bytes per pixels. I checked in Eclipse MAT, it is indeed a byte[9830400], that has one incoming reference which is a android.graphics.Bitmap . I'd like to dump this to a file and try to see it. I can't understand where is it coming from. My biggest image in all my drawables is a 640x960 png, which takes less than 3MB. I tried to use Eclipse to "copy value to

I was trying to investigate java.lang.OutOfMemoryError: GC limit exceeded which occurs at high load of our web app deployed in tomcat. Heap size was set to 8GB ( -Xms2048m -Xmx8192m ) At some point in time our application become unresponsive due to GC activity overhead. I could see in logs that Full GC was occurring multiple times in a row. So I took heap dump with following command ( jmap -F -dump:format=b,file=/root/dump2.hprof 4963 ). File containing dump was 9GB in size. After dump was taken (app was frozen for about 45minutes), multiple full GCs occured till OutOfMemoryError was thrown.