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https://issues.apache.org/jira/browse/HBASE-6870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13461614#comment-13461614
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chunhui shen commented on HBASE-6870:
-------------------------------------
We have took a simple test:
Concurrent 170 thread doing coprocessorExec
Each coprocessorExec do a scan for one region
Total 256 regions in the table
Before the patch:
Total 5s+
After the patch:
Total 200ms+
> HTable#coprocessorExec always scan the whole table
> ---------------------------------------------------
>
> Key: HBASE-6870
> URL: https://issues.apache.org/jira/browse/HBASE-6870
> Project: HBase
> Issue Type: Improvement
> Components: Coprocessors
> Affects Versions: 0.94.1
> Reporter: chunhui shen
> Assignee: chunhui shen
> Attachments: HBASE-6870.patch, HBASE-6870v2.patch
>
>
> In current logic, HTable#coprocessorExec always scan the whole table, its
> efficiency is low and will affect the Regionserver carrying .META. under
> large coprocessorExec requests
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