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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-1502) Add Trace Table docs to user manual
Date Thu, 12 Sep 2013 18:39:52 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eric Newton updated ACCUMULO-1502:
----------------------------------

    Assignee: Jared Winick
    
> Add Trace Table docs to user manual
> -----------------------------------
>
>                 Key: ACCUMULO-1502
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-1502
>             Project: Accumulo
>          Issue Type: Sub-task
>          Components: docs, trace
>            Reporter: Sean Busbey
>            Assignee: Jared Winick
>             Fix For: 1.6.0
>
>         Attachments: ACCUMULO-1502.patch
>
>
> Our feature list includes:
> {quote}
> TRACING
> It can be difficult to determine why some operations are taking longer than expected.
For example, you may be looking up items with very low latency, but sometimes the lookups
take much longer. Determining the cause of the delay is difficult because the system is distributed,
and the typical lookup is fast. Accumulo has been instrumented to record the time that various
operations take when tracing is turned on. The fact that tracing is enabled follows all the
requests made on behalf of the user throughout the distributed infrastructure of Accumulo,
and across all threads of execution.
> {quote}
> and the user manual makes no mention of the facility, its defaults, how to configure
it, nor how to leverage it in ops.

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