Todd Lipcon created KUDU-1450:
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Summary: LogBlockManager start-up is slow due to MemTracker atomic
contention
Key: KUDU-1450
URL: https://issues.apache.org/jira/browse/KUDU-1450
Project: Kudu
Issue Type: Bug
Components: fs, perf
Affects Versions: 0.8.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Attachments: fg.svg
I'm looking at startup time on a cluster with lots of data per node. On this
cluster, the tablet server takes about 30 seconds to start the LogBlockManager,
and appears CPU bound. I grabbed a profile and it seems like most of the CPU is
spent in MemTracker::Release and Consume (see attached flame graph).
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