Log Visualization Tools

[Matt Fowles]

All~

What tools do people know of or have for parsing gc logs and
visualizing the results?

The only thing I can find, GCViewer, (from
http://www.tagtraum.com/gcviewer.html) seems like it has not been
updated for a while and does not parse a lot of more complicated logs
(-XX:+PrintTenuringDistribution or -XX:PrintCMSStatistics=1).

Are there more tools out there?  Are there in house tools that people
are willing to share?

Matt