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https://issues.apache.org/jira/browse/CASSANDRA-791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12833647#action_12833647
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James Churchman commented on CASSANDRA-791:
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oh ok brilliant, i did have a look threw all the issues but i could not see
anything that looked like it!
so it is set in JConsole, but is this not an option that would be better placed
in "storage-conf.xml"?
> Intelligent RAM Caching
> -----------------------
>
> Key: CASSANDRA-791
> URL: https://issues.apache.org/jira/browse/CASSANDRA-791
> Project: Cassandra
> Issue Type: New Feature
> Components: Core
> Reporter: James Churchman
>
> It should be possibly to predefine what cassandra holds in-momory and what it
> does not, or the priority of data to be cached.
> An example would be a column family that stores huge amount of logs of user
> data, but the user rarely every access that data once it has been inserted.
> The other column family is the login details of each user, probably very tiny
> but all of it accessed hundreds of times day. When the large column family is
> updated i presume that all data healed in ram from the smaller one is
> removed from the ram? it would be preferable that priorities or specific "ram
> quotas" could be assigned to each column family to determine how lightly it
> is for the data to stay in ram. This would mean that memory caching programs
> like mem-cache that have that slightly finer level of control (by allocating
> each individual mem-chache a total amount of ram) would no longer be needed
> and it would simplify system design
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