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From "Keith Turner (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (ACCUMULO-4805) Seeing thread contention on FileManager
Date Thu, 15 Feb 2018 16:56:02 GMT

    [ https://issues.apache.org/jira/browse/ACCUMULO-4805?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16357765#comment-16357765
] 

Keith Turner edited comment on ACCUMULO-4805 at 2/15/18 4:55 PM:
-----------------------------------------------------------------

The changes I made in #380 do not completely remove the contention, they just lessened the
amount of time spent doing work while the lock is still held.


was (Author: kturner):
The changes I made in #380 do not completely remove the contention, they just lessened the
amount of content. 

> Seeing thread contention on FileManager
> ---------------------------------------
>
>                 Key: ACCUMULO-4805
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4805
>             Project: Accumulo
>          Issue Type: Bug
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.9.0, 2.0.0
>
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> Accumulo has a tablet server wide cache of open files.  Accessing this cache obtains
a global lock.  In profiling, I am seeing contention on this lock.



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