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Posted to issues@drill.apache.org by "Divya (JIRA)" <ji...@apache.org> on 2017/08/24 02:51:00 UTC
[jira] [Created] (DRILL-5739) Query reads all files after issuing
REFRESH TABLE METADATA command
Divya created DRILL-5739:
----------------------------
Summary: Query reads all files after issuing REFRESH TABLE METADATA command
Key: DRILL-5739
URL: https://issues.apache.org/jira/browse/DRILL-5739
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.10.0
Reporter: Divya
Hi,
Query takes lot of time after issuing refresh metadata command as it is reading all the files .
||Value||Before Refresh Metadata||After Refresh Metadata||
|Fragments|1|13|
|DURATION|01 min 0.233 sec|18 min 0.744 sec|
|PLANNING|59.818 sec|33.087 sec|
|QUEUED|Not Available|Not Available|
|EXECUTION|0.415 sec|17 min 27.657 sec|
I cant paste the whole physical plan for the query
Pasting the relevant one :
*Physical Plan Before Refresh Meta *
numFiles=4, usedMetadataFile=false, columns=
rowcount = 12.0, cumulative cost = {12.0 rows, 780.0 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 9395
*Physical Plan After Refresh Meta *
numFiles=102290, usedMetadataFile=true, cacheFileRoot=<Path to file >
rowcount = 1182008.0, cumulative cost = {1182008.0 rows, 7.683052E7 cpu, 0.0 io, 0.0 network, 0.0 memory}, id = 9685
*Additional Info :*
file format - Parquet
table - partitioned by year,month,day,hour
query format - selecting all the columns with by using partition column in where conditions
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