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From Ruchir Jha <ruchir....@gmail.com>
Subject Full GC in cassandra
Date Mon, 28 Jul 2014 13:53:57 GMT
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

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