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Posted to issues@kudu.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2016/09/16 04:56:20 UTC

[jira] [Created] (KUDU-1622) ResultCache exhibits high contention under non-batched write workload

Todd Lipcon created KUDU-1622:
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             Summary: ResultCache exhibits high contention under non-batched write workload
                 Key: KUDU-1622
                 URL: https://issues.apache.org/jira/browse/KUDU-1622
             Project: Kudu
          Issue Type: Improvement
          Components: perf, rpc
    Affects Versions: 1.0.0
            Reporter: Todd Lipcon


I am running a YCSB workload with non-batched writes, and I see ResultCache among the highest CPU consumers (>15% of the CPU). There's a lot of lock contention on the result cache map. We should consider a more concurrent data structure and/or finer-grained locking.



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