Bikramjeet Vig has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/13979 )

Change subject: IMPALA-8806: Add metrics to improve observability of executor 
groups
......................................................................


Patch Set 4:

(3 comments)

http://gerrit.cloudera.org:8080/#/c/13979/2//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/13979/2//COMMIT_MSG@11
PS2, Line 11: that have at least one live executor, number of executor groups 
that are
> typo -> at least
Done


http://gerrit.cloudera.org:8080/#/c/13979/2/common/thrift/metrics.json
File common/thrift/metrics.json:

http://gerrit.cloudera.org:8080/#/c/13979/2/common/thrift/metrics.json@2456
PS2, Line 2456:     "description": "Total number of executor groups that are in 
a healthy state, that is, have at least the configured minimum number of 
executors to be considered for admission",
> I found the difference between "at least one executor" and "healthy" a bit
Done. Also added a dcheck for cluster-membership.executor-groups.total >= 
cluster-membership.executor-groups.total-healthy.


http://gerrit.cloudera.org:8080/#/c/13979/2/tests/custom_cluster/test_auto_scaling.py
File tests/custom_cluster/test_auto_scaling.py:

http://gerrit.cloudera.org:8080/#/c/13979/2/tests/custom_cluster/test_auto_scaling.py@70
PS2, Line 70:       cluster_size = GROUP_SIZE + 1  # +1 to include coordinator.
> The change here is because previously we were fetching number of executors,
Yes the +1 is because we are also counting the coordinator.
There is currently no metric for the num of coordinators, if you think it will 
be useful we can add it in a separate patch like you suggested.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I7745ea1c7c6778d3fb5e59adbc873697beb0f3b9
Gerrit-Change-Number: 13979
Gerrit-PatchSet: 4
Gerrit-Owner: Bikramjeet Vig <[email protected]>
Gerrit-Reviewer: Andrew Sherman <[email protected]>
Gerrit-Reviewer: Bikramjeet Vig <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Lars Volker <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-Comment-Date: Mon, 05 Aug 2019 20:13:19 +0000
Gerrit-HasComments: Yes

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