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From "Tim Brown (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17515) Reduce memory footprint of RegionLoads kept by StochasticLoadBalancer
Date Wed, 25 Jan 2017 01:21:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836990#comment-15836990
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Tim Brown commented on HBASE-17515:
-----------------------------------

Any recommendations on what to call the new class? I simply refer to it as BalancerRegionLoad.

> 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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