What is your data size and number of columns in Cassandra. Do you do many deletions?
On Mon, Jul 28, 2014 at 2:53 PM, Ruchir Jha <ruchir....@gmail.com> wrote: > Really curious to know what's causing the spike in Columns and > DeletedColums below : > > > 2014-07-28T09:30:27.471-0400: 127335.928: [Full GC 127335.928: [Class > Histogram: > num #instances #bytes class name > ---------------------------------------------- > 1: 132626060 6366050880 java.nio.HeapByteBuffer > 2: 28194918 3920045528 [B > 3: 78124737 3749987376 > edu.stanford.ppl.concurrent.SnapTreeMap$Node > * 4: 67650128 2164804096 > <2164804096> org.apache.cassandra.db.Column* > * 5: 16315310 522089920 org.apache.cassandra.db.DeletedColumn* > 6: 6818 392489608 [I > 7: 2844374 273059904 > edu.stanford.ppl.concurrent.CopyOnWriteManager$COWEpoch > 8: 5727000 229080000 java.util.TreeMap$Entry > 9: 767742 182921376 [J > 10: 2932832 140775936 > edu.stanford.ppl.concurrent.SnapTreeMap$RootHolder > 11: 2844375 91020000 > edu.stanford.ppl.concurrent.CopyOnWriteManager$Latch > 12: 4145131 66322096 > java.util.concurrent.atomic.AtomicReference > 13: 437874 64072392 [C > 14: 2660844 63860256 > java.util.concurrent.ConcurrentSkipListMap$Node > 15: 4920 62849864 [[B > 16: 1632063 52226016 edu.stanford.ppl.concurrent.SnapTreeMap >
