[jira] [Commented] (ZOOKEEPER-3019) Add a metric to track number of slow fsyncs

[ASF GitHub Bot (JIRA)]

    [ 
https://issues.apache.org/jira/browse/ZOOKEEPER-3019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16435790#comment-16435790
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ASF GitHub Bot commented on ZOOKEEPER-3019:
-------------------------------------------

Github user edwardoliveira commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/501#discussion_r181127170
  
    --- Diff: 
src/java/main/org/apache/zookeeper/server/persistence/FileTxnLog.java ---
    @@ -135,6 +136,8 @@
         long currentSize;
         File logFileWrite = null;
     
    +    private ServerStats serverStats;
    --- End diff --
    
    `final` ?


> Add a metric to track number of slow fsyncs
> -------------------------------------------
>
>                 Key: ZOOKEEPER-3019
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3019
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: jmx, server
>    Affects Versions: 3.5.3, 3.4.11
>            Reporter: Norbert Kalmar
>            Assignee: Norbert Kalmar
>            Priority: Major
>
> Add jmx bean and Command to ZooKeeper server to expose the the number of slow 
> fsyncs as a metric.
> FileTxnLog.commit() should count the number of times fsync exceeds 
> fsyncWarningThresholdMS.



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