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Posted to issues@drill.apache.org by "Jacques Nadeau (JIRA)" <ji...@apache.org> on 2015/01/05 00:57:43 UTC

[jira] [Updated] (DRILL-1175) Add hash table occupancy statistics

     [ https://issues.apache.org/jira/browse/DRILL-1175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacques Nadeau updated DRILL-1175:
----------------------------------
    Fix Version/s:     (was: 0.8.0)
                   0.9.0

> Add  hash table occupancy statistics
> ------------------------------------
>
>                 Key: DRILL-1175
>                 URL: https://issues.apache.org/jira/browse/DRILL-1175
>             Project: Apache Drill
>          Issue Type: Improvement
>            Reporter: Aman Sinha
>            Priority: Minor
>             Fix For: 0.9.0
>
>
> For all the hash based operations, we currently collect a few run-time metrics such as number of buckets, number of entries, number of resizing attempts.  We should also collect the hash table occupancy statistics to allow better diagnosis of performance issues.  The occupancy stats should include  min, max and average length of a hash chain among all the buckets. 



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