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https://issues.apache.org/jira/browse/KUDU-1502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved KUDU-1502.
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Resolution: Fixed
Assignee: Todd Lipcon
Fix Version/s: 1.8.0
Fixed this in 64d6d38ba101b08506677ca0e8c2ffafec0b1459 (unfortunately forgot
I'd filed a JIRA about this so the commit message doesn't point here)
> 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
> Assignee: Todd Lipcon
> Priority: Major
> Fix For: 1.8.0
>
> Attachments: fg-memtracker-commented-out.svg, fg.svg
>
>
> 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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