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Posted to issues@impala.apache.org by "Jim Apple (JIRA)" <ji...@apache.org> on 2017/07/09 04:25:00 UTC

[jira] [Created] (IMPALA-5632) Investigate use of transparent huge pages for Bloom Filters

Jim Apple created IMPALA-5632:
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             Summary: Investigate use of transparent huge pages for Bloom Filters
                 Key: IMPALA-5632
                 URL: https://issues.apache.org/jira/browse/IMPALA-5632
             Project: IMPALA
          Issue Type: Task
          Components: Perf Investigation
            Reporter: Jim Apple
            Assignee: Jim Apple


See {{system-allocator.cc}} for some templates for using {{madvise}}. It appears that TLB misses are causing performance degradation in BF lookups. THPs could reduce TLB pressure when the BFs are more than 2MB.



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