[jira] [Created] (IMPALA-5676) BufferedTupleStreamV2::CheckConsistency() is too slow for large streams with small pages in Debug build

["Tim Armstrong (JIRA)" <ji...@apache.org>]

Tim Armstrong created IMPALA-5676:
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             Summary: BufferedTupleStreamV2::CheckConsistency() is too slow for large streams with small pages in Debug build
                 Key: IMPALA-5676
                 URL: https://issues.apache.org/jira/browse/IMPALA-5676
             Project: IMPALA
          Issue Type: Sub-task
          Components: Backend
    Affects Versions: Impala 2.10.0
            Reporter: Tim Armstrong
            Assignee: Tim Armstrong


I saw a spilling query (with a bad plan) spending a huge amount of time in this function.

We should probably split out the O(n) parts of CheckConsistency() into a separate function that is run less frequently, e.g. once per pass over the stream.



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