Permanent/old generation space occupancy

permgenrecommendation

This graphs is generated from the garbage collection logs using ‘R’. The legend shows the general
recommendation based on the mean occupancy(Charlie Hunt’s book on Java performance).

  1. 1.2x to 1.5x permanent generation space occupancy after full garbage collection
  2. 2x to 3x old generation space occupancy after full garbage collection

Some values of time in the x-axis are too close together for reasons that I couldn’t understand. My previous blog entry has the old code and graph. I will post the modified code.

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