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From Jason Wee <peich...@gmail.com>
Subject offheap component
Date Tue, 31 Dec 2013 13:35:07 GMT
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

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