[kudu-CR] KUDU-1444. Get resource metrics of a scan.

["zhen.zhang (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins,

I'd like you to reexamine a change.  Please visit

    http://gerrit.cloudera.org:8080/3013

to look at the new patch set (#4).

Change subject: KUDU-1444. Get resource metrics of a scan.
......................................................................

KUDU-1444. Get resource metrics of a scan.

This patch supports to get the resource metrics of a scan in client side. The
resource metrics will be sent back to client in every scan RPC response. This
is useful for impala to show these stats in a query profile.

For now, the resource metrics only contains cfile_cache_miss_bytes and
cfile_cache_hit_bytes. We may add more in the future as needed.

Change-Id: Iedaf570a7601651c93275ae0a8565f1e33da842d
---
M src/kudu/cfile/cfile_reader.cc
M src/kudu/client/CMakeLists.txt
M src/kudu/client/client.cc
M src/kudu/client/client.h
A src/kudu/client/resource_metrics-internal.h
A src/kudu/client/resource_metrics.cc
A src/kudu/client/resource_metrics.h
M src/kudu/client/scanner-internal.cc
M src/kudu/client/scanner-internal.h
M src/kudu/tserver/tablet_service.cc
M src/kudu/tserver/tserver.proto
M src/kudu/util/trace_metrics.h
12 files changed, 251 insertions(+), 4 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/13/3013/4
-- 
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iedaf570a7601651c93275ae0a8565f1e33da842d
Gerrit-PatchSet: 4
Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-Owner: zhen.zhang <zh...@xiaomi.com>
Gerrit-Reviewer: Kudu Jenkins
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: zhen.zhang <zh...@xiaomi.com>