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https://issues.apache.org/jira/browse/HBASE-8744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13684056#comment-13684056
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stack commented on HBASE-8744:
------------------------------
[~blackpearl] Have you seen http://hbase.apache.org/book.html#tracing and
https://github.com/cloudera/htrace ?
> Enable HBase to log the entire latency profile for HDFS packets resulting in
> slow writes.
> -----------------------------------------------------------------------------------------
>
> Key: HBASE-8744
> URL: https://issues.apache.org/jira/browse/HBASE-8744
> Project: HBase
> Issue Type: Improvement
> Reporter: Pritam Damania
> Priority: Minor
>
> When we see WAL outliers in HBase, at times it is not clear which component
> in the whole stack is slow. At facebook we are implementing per request
> profiling which passes profiling information throughout the entire stack.
> This information can be used to determine the outliers in HBase.
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