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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/03/10 21:54:50 UTC
[jira] Updated: (HBASE-1253) Remove unnecessary, expensive column
matcher lookup
[ https://issues.apache.org/jira/browse/HBASE-1253?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-1253:
-------------------------
Attachment: 1253.patch
Purge map. Just use Vector of matchers (Vector should probably be purged since Vector is synchronized and I don't think it needs be).
> Remove unnecessary, expensive column matcher lookup
> ---------------------------------------------------
>
> Key: HBASE-1253
> URL: https://issues.apache.org/jira/browse/HBASE-1253
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: stack
> Fix For: 0.19.1
>
> Attachments: 1253.patch
>
>
> We do lots of matching on columns. We have different kinds of matchers dependent on how the scanner was configured. Down in HAS, we have a map of family name to its matchers. There is no need of the Map since column matching is done at the family/store context only. Removing should save on some unnecessary CPU (I saw up to 10% in simple seek+scan test -- so hopefully this comes down to 5 or 4%).
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