Todd Lipcon created KUDU-1502:
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Summary: Block cache with churn burns lots of CPU in MemTracker
consume and release
Key: KUDU-1502
URL: https://issues.apache.org/jira/browse/KUDU-1502
Project: Kudu
Issue Type: Bug
Components: perf, util
Affects Versions: 0.9.0
Reporter: Todd Lipcon
I am running a random-write workload where the bloom filters don't fit in the
block cache (but do fit in page cache) which causes a lot of block cache churn.
I'm seeing MemTracker::Release and MemTracker::Consume take the majority of CPU
on the system.
It seems like this is low-hanging fruit -- we don't need exactly up-to-date
accounting here so should be pretty easy to optimize.
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