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From Apache Wiki <>
Subject [Cassandra Wiki] Update of "Operations" by TristanTarrant
Date Wed, 24 Nov 2010 05:14:22 GMT
Dear Wiki user,

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

The "Operations" page has been changed by TristanTarrant.
The comment on this change is: Added info about JNA and backups.


  This is caused by the operating system trying to allocate the child "ln" process a memory
space as large as the parent process (the cassandra server), even though '''it's not going
to use it'''. So if you have a machine with 8GB of RAM and no swap, and you gave 6GB to the
cassandra server, it will fail during this because the operating system wants 12 GB of virtual
memory before allowing you to create the process. 
  This error can be worked around by either :
+  * dropping the jna.jar file into Cassandra's lib folder (requires at least Cassandra 0.6.6)
+ OR
   * creating a swap file, snapshotting, removing swap file

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