zhen.zhang has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/8904


Change subject: KUDU-2238. DMS not flush under memory pressure.
......................................................................

KUDU-2238. DMS not flush under memory pressure.

When we choose DMS to flush, now we always pick the DMS with
highest log retention. However, as KUDU-2238 shows, in some cases
DMS with highest log retention may only consume little memory, and
other DMSs may consume much more memory, but get no change to be
flushed, even under memory pressure.

This patch gives the ability to take memory consumption into
consideration when we choose DMS.

Change-Id: I0c04d76aa0e3888352dc56eeb493a5437ef47e42
---
M src/kudu/tablet/tablet.cc
M src/kudu/tablet/tablet.h
M src/kudu/tablet/tablet_replica_mm_ops.cc
3 files changed, 19 insertions(+), 8 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/04/8904/1
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I0c04d76aa0e3888352dc56eeb493a5437ef47e42
Gerrit-Change-Number: 8904
Gerrit-PatchSet: 1
Gerrit-Owner: zhen.zhang <zhangz...@xiaomi.com>

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