Excerpts from http://www.datastax.com/documentation/cassandra/2.0/webhelp/cassandra/operations/ops_tune_jvm_c.html
In Cassandra 1.2 and later, the Bloom filter and compression offset map that store this metadata reside off-heap, greatly increasing the capacity per node of data that Cassandra can handle efficiently. In Cassandra 2.0, the partition summary also resides off-heap. How do we determine if a cassandra component is on heap or offheap? By off-heap, it means that the object is stored *not* in the allocated heap in jvm but in native memory? As the off-heap context is not the same as Non-heap? http://www.yourkit.com/docs/kb/sizes.jsp Thank you. Jason
