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https://issues.apache.org/jira/browse/CASSANDRA-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13501464#comment-13501464
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Jonathan Ellis commented on CASSANDRA-3961:
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Eyeballing this looks reasonable.  Can you rebase to trunk?
                
> Make index_interval configurable per column family
> --------------------------------------------------
>
>                 Key: CASSANDRA-3961
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3961
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>         Environment: Cassandra 1.0.7/unix
>            Reporter: Radim Kolar
>            Assignee: Radim Kolar
>             Fix For: 1.3
>
>         Attachments: cass-interval1.txt, cass-interval2.txt
>
>
> After various experiments with mixing OLTP a OLAP workload running on single 
> cassandra cluster i discovered that lot of memory is wasted on holding index 
> samples for CF which are rarely accessed or index is not much used for CF 
> access because slices over keys are used. 
> There is per column family setting for configuring bloom filters - 
> bloom_filter_fp_chance. Please add setting index_interval configurable per CF 
> as well. If this setting is not set or it is zero, default from 
> cassandra.yaml will be used.

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