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Posted to issues@spark.apache.org by "yucai (JIRA)" <ji...@apache.org> on 2018/07/26 02:18:00 UTC

[jira] [Created] (SPARK-24925) input bytesRead metrics fluctuate from time to time

yucai created SPARK-24925:
-----------------------------

             Summary: input bytesRead metrics fluctuate from time to time
                 Key: SPARK-24925
                 URL: https://issues.apache.org/jira/browse/SPARK-24925
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.3.1
            Reporter: yucai


input bytesRead metrics fluctuate from time to time, it is worse when pushdown enabled.

Query
{code:java}
CREATE TABLE dev AS
SELECT
...
FROM lstg_item cold, lstg_item_vrtn v
WHERE cold.auct_end_dt = CAST(SUBSTR('2018-03-18 00:00:00',1,10) AS DATE)
AND v.auct_end_dt = CAST(SUBSTR('2018-03-18 00:00:00',1,10) AS DATE)
...
{code}

Issue
See attached gif, input bytesRead shows 48GB, 52GB, 51GB, 50GB, 54GB, 53GB ... 



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