Details
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Bug
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Status: Reopened
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Minor
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Resolution: Unresolved
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None
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None
Description
query like select * from `/drill/data` limit 100 takes quite long to terminate, about 20+ seconds.
/drill/data includes overall 1100 csv files, all in single directory.
select * from `/drill/data/d2.csv` limit 100; terminates in 0.2 seconds.
Attachments
Issue Links
- duplicates
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DRILL-1072 Drill is very slow when we have a large number of text files
- Closed
- is related to
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DRILL-3722 LIMIT 1 query on top of a dir with 50K files takes ~150 seconds
- Open
- relates to
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DRILL-1682 Avoid using UnionExchange for read workloads
- Open