My colleague Tao Zhang has been working on a 
The plugin allows you to log statistics to a csv file at a specified interval. It also lets you graph stats in real time:
jconsole plugin which will let you monitor Berkeley DB Java Edition stats in real time. This will be especially useful for helping our customers debug performance issues. We're all really excited about this new feature which will be available in JE 4.0 (the corporate lawyers will only let me say "GA in CY 10"). I want to share some screen shots of this.
Here's a picture of the plugin. Note the two new tabs ("JE Statistics" and "JE Replicated Statistics").
The plugin allows you to log statistics to a csv file at a specified interval. It also lets you graph stats in real time:
