How much memory does jProfiler need to analyze a heap dump of size X?

Question

I have a heap size of X (= 5 giga bytes). How much should I allocate for jprofiler to efficiently analyze this heap?

Answer 1

I would recommend using Eclipse MAT to view the heap dump. It does a much better job in terms of memory requirements for a heap dump of size X because it creates intermediate index files on disk instead of sucking up the whole thing into it's own memory. Most tools require some multiple N of X to open the heap dump where N is usually >= 2. Also, make sure to start the Java process that runs MAT or JProfiler in 64-bit if you're going to give them more than 2g of memory.