[kudu-CR] [maintenance] Add privilege maintenance thread pool for privilege tables and tablets

["Yingchun Lai (Code Review)" <ge...@cloudera.org>]

Yingchun Lai has posted comments on this change. ( http://gerrit.cloudera.org:8080/12852 )

Change subject: [maintenance] Add privilege maintenance thread pool for privilege tables and tablets
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Patch Set 1:

Some design improvements:
1. Define several integer priority levels for tables, like [-5, 5], default level is 0
2. Each level has a multiplier on the op scores, Level N's multiplier is base_multiplier^N, base_multiplier is some like 1.1
3. Like rocksDB, we keep two kind of thread pools, one for flush, and the other for compaction(and GC in Kudu).


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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I3ea3b73505157678a8fb551656123b64e6bfb304
Gerrit-Change-Number: 12852
Gerrit-PatchSet: 1
Gerrit-Owner: Yingchun Lai <40...@qq.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>
Gerrit-Reviewer: Will Berkeley <wd...@gmail.com>
Gerrit-Reviewer: Yingchun Lai <40...@qq.com>
Gerrit-Comment-Date: Tue, 07 May 2019 16:22:56 +0000
Gerrit-HasComments: No