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From Apache Wiki <>
Subject [Cassandra Wiki] Update of "FAQ" by ChrisBurroughs
Date Wed, 06 Apr 2011 17:31:11 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Cassandra Wiki" for change notification.

The "FAQ" page has been changed by ChrisBurroughs.


   * [[#mmap|Why does top report that Cassandra is using a lot more memory than the Java heap
   * [[#jna|I'm getting Cannot run program "ln" when trying to snapshot
or update a keyspace]]
   * [[#replicaplacement|How does Cassandra decide which nodes have what data?]]
+  * [[#cachehitrateunits| I have a row or key cache hit rate of 0.XX123456789.  Is that XX%
or 0.XX% ?]]
  == Why can't I make Cassandra listen on (all my addresses)? ==
@@ -417, +419 @@

  It is important to understand that Cassandra ''does not'' alter the replica set for a given
row key based on changing characteristics like current load, which nodes are up or down, or
which node your client happens to talk to.
+ <<Anchor(cachehitrateunits)>>
+ == I have a row or key cache hit rate of 0.XX123456789 reported by JMX.  Is that XX% or
0.XX% ? ==
+ XX%

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