[jira] [Commented] (IMPALA-7975) Improve supportability of the automatic invalidate feature

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-7975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16930706#comment-16930706 ] 

ASF subversion and git services commented on IMPALA-7975:
---------------------------------------------------------

Commit 1a00227e6aaffd99ffcce30b4beda5eb5f0d2fb1 in impala's branch refs/heads/master from Anurag Mantripragada
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=1a00227 ]

IMPALA-7975(continued): Improve supportability of the automatic
invalidate feature.

This work was done by Sharanitha Harish.

This commit adds support to display the metric last-synced-event-id
as /metrics#events page whereas previously it was displayed
only on the /events page.

Testing:
Added tests toMetaStoreEventsProcessorTest to verify:
1. If the metric updated as it should when new events were processed.
2. If the metric was not set when the event processor was not active.

Change-Id: Iadab4a6cd3ad3c6c1b7931747ac55cd58ce3bb3d
Reviewed-on: http://gerrit.cloudera.org:8080/14200
Reviewed-by: Impala Public Jenkins <im...@cloudera.com>
Tested-by: Impala Public Jenkins <im...@cloudera.com>


> Improve supportability of the automatic invalidate feature
> ----------------------------------------------------------
>
>                 Key: IMPALA-7975
>                 URL: https://issues.apache.org/jira/browse/IMPALA-7975
>             Project: IMPALA
>          Issue Type: Sub-task
>            Reporter: Vihang Karajgaonkar
>            Assignee: Vihang Karajgaonkar
>            Priority: Major
>             Fix For: Impala 3.2.0
>
>
> Some of the things which can be done to improve supportability of this feature:
> * Add metrics to detect issues pertaining to this feature
> # Time taken to fetch the notifications (Would be useful to have average, min, max)
> # Time taken to process a batch of events received
> # Number of times particular table was invalidated (would be useful to have some rate metric like number_of_invalidates/per_hour)
> * Ability to turn ON/OFF for this feature (possibly without the need of a restart)



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