"A free tool that helps you analyse your JVM memory with no overhead except when (infrequently) used, sounds almost too good to be true - unexpected memory issues in production is one of the more painful things to happen, and the easier, quicker and earlier you can diagnose these types of problems, the better."
"The percentage of time spent stopped in GC is given by the formula ('avg pause time')/('avg time between pauses' + 'avg pause time') and this can be used to compare between different configuration settings to determine improved configs."
