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From "Chia-Ping Tsai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18772) [JDK8] Replace AtomicLong with LongAdder
Date Tue, 12 Sep 2017 10:35:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16162776#comment-16162776
] 

Chia-Ping Tsai commented on HBASE-18772:
----------------------------------------

+1

> [JDK8]  Replace AtomicLong with LongAdder
> -----------------------------------------
>
>                 Key: HBASE-18772
>                 URL: https://issues.apache.org/jira/browse/HBASE-18772
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 2.0.0-alpha-2
>            Reporter: Yechao Chen
>            Assignee: Yechao Chen
>            Priority: Trivial
>             Fix For: 2.0.0-beta-1
>
>         Attachments: HBASE-18772.master.patch, HBASE-18772.master-v2.patch, HBASE-18772.master-v3.patch
>
>
> Currently we use many AtomicLong in HBase Region Code ,such as BucketCache calss realCacheSize,heapSize,blockNumber,accessCount
 and HRegion calss  compactionNumBytesCompacted etc .
> In JDK8 LongAdder  is faster than AtomicLong ,should use this replace  AtomicLong 



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