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The JRA Tool is a Java application that parses a JRA recording and visualizes the data. This is a convenient way to analyze the data offline. The size of the compressed recording is on the order of a few hundred kilobytes, so a system administrator can easily make a recording of a deployed system and send it to the JVM or application developer who probably is in a better position to analyze it.
The JRA Tool shows a top list of the hottest methods where you can select a method and see its call tree, i.e. its predecessors (what other methods have called this method) and successors (what methods the selected method will call). A percentage for each branch indicates how common a given path is.
As for memory management, there is a graph of the varying heap usage and pause times for the garbage collections. Detailed information about each GC shows exactly how much memory was released in a collection. There are also pie charts showing the distributions in size of free memory blocks and the distribution of occupied memory in small and large object chunks.
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