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Posted to issues@kudu.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2016/05/12 02:07:13 UTC

[jira] [Created] (KUDU-1450) LogBlockManager start-up is slow due to MemTracker atomic contention

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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