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https://issues.apache.org/jira/browse/HBASE-17515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15840557#comment-15840557
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Hudson commented on HBASE-17515:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-1.4 #605 (See
[https://builds.apache.org/job/HBase-1.4/605/])
HBASE-17515 Reduce memory footprint of RegionLoads kept by (tedyu: rev
3dc03ccfb7e1964cdd06a57a11f292a95c13248f)
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestStochasticLoadBalancer.java
* (delete)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/StochasticLoadBalancer.java
* (edit)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java
> 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
> Fix For: 2.0.0
>
> Attachments: 17515.branch-1.v2.txt, 17515.v1.txt, 17515.v2.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.
> Lowering memory footprint would allow wider sliding window to be configured
> for load balancer while limiting the impact to heap consumption.
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