[Impala-ASF-CR] IMPALA-11606: add 'untracked memory' metric

["Xiang Yang (Code Review)" <ge...@cloudera.org>]

Hello Xianqing He, Jian Zhang, Impala Public Jenkins, 

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

    http://gerrit.cloudera.org:8080/19029

to look at the new patch set (#8).

Change subject: IMPALA-11606: add 'untracked memory' metric
......................................................................

IMPALA-11606: add 'untracked memory' metric

Add a gauge metric 'untracked memroy' to record the memory size that
not tracked by the 'process' mem-tracker.

Testing:
 - Manually request the debug UI metrics interface and compare the
   value with the untracked memory in memz page.
 - Run core jobs.

Change-Id: Ib16e00109d732f759c96c7a967eb1cc32124a03f
---
M be/src/runtime/mem-tracker.cc
M be/src/runtime/mem-tracker.h
M common/thrift/metrics.json
3 files changed, 46 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/29/19029/8
-- 
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ib16e00109d732f759c96c7a967eb1cc32124a03f
Gerrit-Change-Number: 19029
Gerrit-PatchSet: 8
Gerrit-Owner: Xiang Yang <yx...@126.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Jian Zhang <zj...@gmail.com>
Gerrit-Reviewer: Xianqing He <he...@126.com>