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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-12748) RegionCoprocessorHost.execOperation creates too many iterator objects
Date Wed, 23 Sep 2015 05:34:05 GMT

     [ https://issues.apache.org/jira/browse/HBASE-12748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andrew Purtell updated HBASE-12748:
-----------------------------------
    Attachment: HBASE-12748.patch

Updated patch for master that backs the SortedList with an unmodifiable list. Minor cleanups.


> RegionCoprocessorHost.execOperation creates too many iterator objects
> ---------------------------------------------------------------------
>
>                 Key: HBASE-12748
>                 URL: https://issues.apache.org/jira/browse/HBASE-12748
>             Project: HBase
>          Issue Type: Sub-task
>    Affects Versions: 0.94.25, 0.98.9
>            Reporter: Vladimir Rodionov
>            Assignee: Andrew Purtell
>             Fix For: 2.0.0, 1.3.0, 0.98.15
>
>         Attachments: HBASE-12748.patch, HBASE-12748.patch, HBase-12748.patch
>
>
> This is typical pattern of enhanced for ... loop usage in a hot code path. For every
HBase operation it instantiates iterator for coprocessor list twice. 



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