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https://issues.apache.org/jira/browse/HBASE-17515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15840704#comment-15840704
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Hudson commented on HBASE-17515:
--------------------------------
FAILURE: Integrated in Jenkins build HBase-Trunk_matrix #2391 (See
[https://builds.apache.org/job/HBase-Trunk_matrix/2391/])
HBASE-17515 Reduce memory footprint of RegionLoads kept by (tedyu: rev
e8979c67aa9cf0995b5f1603db72175f3eb222d5)
* (edit)
hbase-server/src/test/java/org/apache/hadoop/hbase/master/balancer/TestStochasticLoadBalancer.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
* (delete)
hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BalancerRegionLoad.java
HBASE-17515 Reduce memory footprint of RegionLoads kept by (tedyu: rev
07c175b10a6f91ec3fc82339059313a5f9060d3d)
* (add)
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/test/java/org/apache/hadoop/hbase/master/balancer/TestStochasticLoadBalancer.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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