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From Apache Wiki <>
Subject [Cassandra Wiki] Update of "GettingStarted" by jeremyhanna
Date Fri, 28 Jun 2013 14:12:06 GMT
Dear Wiki user,

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

The "GettingStarted" page has been changed by jeremyhanna:

Trying to update recommendations for heap and heap new size.

- As a rule of thumb, you should set `HEAP_NEWSIZE` to be 1/4 of `MAX_HEAP_SIZE`. If you face
OutOfMemory exceptions or massive GCs with this configuration, increase both of these values.
+ For `MAX_HEAP_SIZE` use as little as you can get away with.  It's recommended to stay within
8G because much beyond that, the CMS GC pauses interfere with normal operations.
+ For `HEAP_NEWSIZE` use the number of cores * 100 but don't exceed 800M.  With too much allocated,
ParNew GC pauses become detrimental.
  == Step 3: Start Cassandra ==

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