How can I get jVisualVM to display longer timeframes?

I am trying to use jVisualVM to monitor the long-term heap use of a few applications I am developing. Currently it only shows the past hour under the "Monitor" tab. Is th开发者_Go百科ere any way I can view a longer timeframe, and even better, any way I can view it from start to end?

If this can't be done in jVisualVM, are there any suggestions on alternatives?