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https://issues.apache.org/jira/browse/CASSANDRA-3662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Radim Kolar resolved CASSANDRA-3662.
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Resolution: Not A Problem
i already did that myself.
> Report memory used by row index samples
> ---------------------------------------
>
> Key: CASSANDRA-3662
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3662
> Project: Cassandra
> Issue Type: Improvement
> Components: Tools
> Affects Versions: 0.8.9, 1.0.6
> Reporter: Radim Kolar
> Priority: Minor
>
> For better memory tuning on nodes with huge number of rows in CF, it will be
> good to know how much memory is used by entries collected during index
> sampling.
> This will allow user to fine tune _index_interval_
> Proposed output as addition to nodetool cfstats
> Column Family: sipdb
> SSTable count: 13
> Space used (live): 27378331692
> Space used (total): 27378331692
> Number of Keys (estimate): 216613000
> *Sampled index entries: 433226*
> *Memory used by sampled index: 51987120*
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