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From "Impala Public Jenkins (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-4764: Add Hedged read metrics
Date Mon, 15 May 2017 22:57:33 GMT
Impala Public Jenkins has submitted this change and it was merged.

Change subject: IMPALA-4764: Add Hedged read metrics

IMPALA-4764: Add Hedged read metrics

The following Hadoop metrics have been added to the /metrics page:

hedgedReadOps - the number of hedged reads that have occurred

hedgedReadOpsWin - the number of times the hedged read returned
faster than the original read

The metrics will be updated only when --use_hdfs_pread is set to

This change depends on the following new commit to HDFS:

Testing: Not adding tests since it requires some custom hadoop
configuration. Tested manually by setting the configurations and
verifying that the metrics work.

Change-Id: Id4a5d396abb3373d352ad2df8c2272db018114da
Reviewed-by: Matthew Jacobs <>
Reviewed-by: Lars Volker <>
Tested-by: Impala Public Jenkins
M be/src/runtime/
M be/src/util/
M be/src/util/impalad-metrics.h
M common/thrift/metrics.json
4 files changed, 56 insertions(+), 1 deletion(-)

  Impala Public Jenkins: Verified
  Lars Volker: Looks good to me, but someone else must approve
  Matthew Jacobs: Looks good to me, approved

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Gerrit-MessageType: merged
Gerrit-Change-Id: Id4a5d396abb3373d352ad2df8c2272db018114da
Gerrit-PatchSet: 6
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Sailesh Mukil <>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Lars Volker <>
Gerrit-Reviewer: Matthew Jacobs <>
Gerrit-Reviewer: Sailesh Mukil <>

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