Inexplicable Full GCs with the G1 collector

Issue

• We're using the G1 collector. A few times a day we see pausing Full GCs, but we can't see why since there's plenty of heap available:

  [Full GC 2714M->2033M(8192M), 25,3463589 secs]
  

  [Times: user=34,24 sys=0,53, real=25,35 secs]