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https://issues.apache.org/jira/browse/CASSANDRA-6001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13788846#comment-13788846
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Jonathan Ellis commented on CASSANDRA-6001:
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Ping [~lyubent]
> Add a Tracing line for index/seq scan queries
> ---------------------------------------------
>
> Key: CASSANDRA-6001
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6001
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jonathan Ellis
> Assignee: Lyuben Todorov
> Fix For: 1.2.11
>
> Attachments: 6001.patch, 6001-v2.txt
>
>
> Tracing should show the user why a specific index was selected. Something
> like
> {noformat}
> Index mean cardinality is {users_by_lastname: 100, users_by_state: 2000,
> users_by_birthdate: 1000}. Scanning with users_by_lastname.
> {noformat}
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