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https://issues.apache.org/jira/browse/HBASE-17515?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Brown updated HBASE-17515:
------------------------------
    Attachment: 17515.v1.txt

> Reduce memory footprint of RegionLoads kept by StochasticLoadBalancer
> ---------------------------------------------------------------------
>
>                 Key: HBASE-17515
>                 URL: https://issues.apache.org/jira/browse/HBASE-17515
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Tim Brown
>         Attachments: 17515.v1.txt
>
>
> Currently StochasticLoadBalancer uses the following fields of RegionLoad :
> {code}
>       return rl.getReadRequestsCount();
>       return rl.getWriteRequestsCount();
>       return rl.getMemStoreSizeMB();
>       return rl.getStorefileSizeMB();
> {code}
> However, RegionLoad refers to ClusterStatusProtos.RegionLoad which has 18 
> fields.
> This means we keep hbase.master.balancer.stochastic.numRegionLoadsToRemember 
> (default value 15) RegionLoad's in memory but only use a small portion of 
> them.
> This JIRA is to consider creating POJO which wraps the above 4 fields so that 
> the memory footprint can be lowered.



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