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Posted to oak-issues@jackrabbit.apache.org by "Thomas Mueller (JIRA)" <ji...@apache.org> on 2017/05/09 08:37:04 UTC

[jira] [Created] (OAK-6187) Index usage analysis (which index was used when and how)

Thomas Mueller created OAK-6187:
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             Summary: Index usage analysis (which index was used when and how)
                 Key: OAK-6187
                 URL: https://issues.apache.org/jira/browse/OAK-6187
             Project: Jackrabbit Oak
          Issue Type: Bug
            Reporter: Thomas Mueller


In order to reduce space usage, unused indexes should be removed or trimmed. Trimmed, because an index definition might contain "too much" (specially Lucene indexes, which index multiple properties and can be very large).

One solution is to 
* log each query (avoiding duplicates), 
* include which indexes were used,
* from that generate the minimum index definitions,
* compared with existing indexes, get the list of unused indexes and index features since day X.



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