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https://issues.apache.org/jira/browse/ZOOKEEPER-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15989069#comment-15989069
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ASF GitHub Bot commented on ZOOKEEPER-2662:
-------------------------------------------

Github user hanm commented on the issue:

    https://github.com/apache/zookeeper/pull/243
  
    merged, please close this pr @eribeiro .


> Export a metric for txn log sync times
> --------------------------------------
>
>                 Key: ZOOKEEPER-2662
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2662
>             Project: ZooKeeper
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>            Assignee: Edward Ribeiro
>             Fix For: 3.5.4, 3.6.0
>
>         Attachments: ZOOKEEPER-2662.diff
>
>
> In FileTxnLog there is code that records the amount of time required to fsync 
> the txn log in order to warn if that time exceeds a configurable threshold. 
> This information should also be exported as a metric available by JMX so an 
> important aspect of quorum performance can be monitored. 
> ZooKeeperServerMXBean carries some global latency information for the server 
> process already, seems like a good place to put it if not an entirely new 
> bean for the TxnLog. After ZOOKEEPER-2310 might want to collect the same 
> information for snapshots. 



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