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https://issues.apache.org/jira/browse/ACCUMULO-4074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16539291#comment-16539291
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Keith Turner commented on ACCUMULO-4074:
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Work was done in https://github.com/apache/accumulo/pull/549

> create user-configurable resource pools for different kinds of requests
> -----------------------------------------------------------------------
>
>                 Key: ACCUMULO-4074
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4074
>             Project: Accumulo
>          Issue Type: Improvement
>          Components: client, tserver
>            Reporter: Eric Newton
>            Assignee: Keith Turner
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 4h 10m
>  Remaining Estimate: 0h
>
> Complex queries and iterator stacks can sometimes run for long periods of 
> time.  During that time, access to resources for shorter, simpler lookups can 
> be blocked.  Use separate resource pools to allow for simpler queries to be 
> able to run regardless.  This same mechanism could be used for the metadata 
> and root tables, too.



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