Details
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Sub-task
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Status: Resolved
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Minor
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Resolution: Fixed
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Impala 3.1.0
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None
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ghx-label-3
Description
Impala should print EC-related info in the query plan to help user understand the behavior and diagnose performance issues easier. The most trivial design would look like:
[localhost:21000] functional> explain select * from functional.alltypes; Query: explain select * from functional.alltypes +-------------------------------------------------------------+ | Explain String | +-------------------------------------------------------------+ | Max Per-Host Resource Reservation: Memory=32.00KB Threads=3 | | Per-Host Resource Estimates: Memory=160.00MB | | Codegen disabled by planner | | | | PLAN-ROOT SINK | | | | | 01:EXCHANGE [UNPARTITIONED] | | | | | 00:SCAN HDFS [functional.alltypes] | | partitions=24/24 files=25 size=498.41KB | | EC files=24 size=478.45KB | +-------------------------------------------------------------+
In the query profile we should at least print "EC bytes scanned" in the scan node.
Attachments
Issue Links
- is related to
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IMPALA-6050 Query profiles should clearly indicate storage layer(s) used
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- Resolved
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