Adar Dembo created KUDU-1972:
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Summary: Explore ways to reduce maintenance manager CPU load
Key: KUDU-1972
URL: https://issues.apache.org/jira/browse/KUDU-1972
Project: Kudu
Issue Type: Sub-task
Components: tserver
Affects Versions: 1.4.0
Reporter: Adar Dembo
The current design of the maintenance manager includes a dedicated thread that
wakes up every so often (default to 250 ms), looks for work to do, and
schedules it to be done on helper threads. On a large cluster, "look for work
to do" can be very CPU intensive. We should explore ways to mitigate this.
Additionally, if we identify "cold" tablets (i.e. those not servicing any
writes), we should be able to further reduce their scheduling load, perhaps by
not running the compaction knapsack solver on them at all.
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