> INFO [GC inspection] 2010-07-21 01:01:49,661 GCInspector.java (line 110) GC for ConcurrentMarkSweep: 11748 ms, 413673472 reclaimed leaving 9779542600 used; max is 10873667584 > ERROR [Thread-35] 2010-07-21 01:02:10,941 CassandraDaemon.java (line 78) Fatal exception in thread Thread[Thread-35,5,main] > java.lang.OutOfMemoryError: Java heap space > INFO [GC inspection] 2010-07-21 01:02:10,958 GCInspector.java (line 110) GC for ConcurrentMarkSweep: 10043 ms, 259576 reclaimed leaving 10172790816 used; max is 10873667584
So that confirms a "legitimate" out-of-memory condition in the sense that CMS is reclaiming extremely little and the live set after a concurrent mark/sweep is indeed around the 10 gig. -- / Peter Schuller