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https://issues.apache.org/jira/browse/ZOOKEEPER-2662?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15985814#comment-15985814
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Edward Ribeiro commented on ZOOKEEPER-2662:
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Hey [~ckulkarni], I didn't have any spare cycle to spend on ZK issues, but got
to resume it now. Thanks for bringing this up. Yup, I think this unit test is
enough, so thank you **very much** for the test case. :)
[~hanm], would you mind to take a look at this PR, please?
> 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: 3.6.0
>
> 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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