Will Berkeley has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/8228 )

Change subject: Implement per-tablet active scanner metric
......................................................................


Patch Set 2:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/8228/2//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/8228/2//COMMIT_MSG@11
PS2, Line 11: - scanners_expired
            : - scanner_duration
> have you found these two metrics to be useful in practice?

Nope. I was establishing parity with the server-level metrics.

> It seems on larger clusters we're starting to hit some scalability limits 
> with per-tablet metric collection

I'm curious to know what the limits were.

>  if we don't have good use cases for these, maybe we should leave them as is?

OK. I'll leave them out. I kept the new test for expired scanners (minus the 
per-tablet part) since it adds coverage.



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I3b2d85f78c655e02654f8581e9521452b149b7d5
Gerrit-Change-Number: 8228
Gerrit-PatchSet: 2
Gerrit-Owner: Will Berkeley <[email protected]>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Tidy Bot
Gerrit-Reviewer: Todd Lipcon <[email protected]>
Gerrit-Reviewer: Will Berkeley <[email protected]>
Gerrit-Comment-Date: Mon, 16 Oct 2017 06:34:42 +0000
Gerrit-HasComments: Yes

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