Details
-
Bug
-
Status: Closed
-
Critical
-
Resolution: Fixed
-
1.9.0
-
None
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4 node cluster centos
Description
max(dir0), max(dir1) query against parquet data slower by 2X
test was run with meta data cache on both 1.7.0 and 1.9.0
there is a difference in query plan and also execution time on 1.9.0 is close to 2X that on 1.7.0
Test from Drill 1.9.0 git commit id: 28d315bb
on 4 node Centos cluster
0: jdbc:drill:schema=dfs.tmp> select max(dir0), max(dir1), max(dir2) from `DRILL_4589`; +---------+---------+---------+ | EXPR$0 | EXPR$1 | EXPR$2 | +---------+---------+---------+ | 2015 | Q4 | null | +---------+---------+---------+ 1 row selected (70.644 seconds)
Query plan for the above query, note than in Drill 1.9.0 usedMetadataFile is not available is the query plan text.
0: jdbc:drill:schema=dfs.tmp> explain plan for select max(dir0), max(dir1), max(dir2) from `DRILL_4589`;
+------+------+
| text | json |
+------+------+
| 00-00 Screen
00-01 Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$2=[$2])
00-02 StreamAgg(group=[{}], EXPR$0=[MAX($0)], EXPR$1=[MAX($1)], EXPR$2=[MAX($2)])
00-03 UnionExchange
01-01 StreamAgg(group=[{}], EXPR$0=[MAX($0)], EXPR$1=[MAX($1)], EXPR$2=[MAX($2)])
01-02 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q1/f672.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2011/Q4/f162.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q2/f1101.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q2/f110.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2006/Q3/f1192.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1999/Q2/f174.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2006/Q4/f885.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q3/f1720.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q1/f1779.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q2/f629.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q4/f821.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2015/Q3/f896.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2002/Q2/f1458.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q4/f1756.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q2/f1490.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q3/f1137.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q1/f561.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q3/f1562.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q1/f1445.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2006/Q1/f236.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1992/Q4/f1209.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q2/f518.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1993/Q4/f1598.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2008/Q1/f780.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1999/Q1/f1763.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q4/f381.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q1/f1870.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q1/f915.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q2/f673.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1998/Q1/f736.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q2/f749.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2007/Q3/f111.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1993/Q3/f776.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2002/Q1/f403.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q2/f904.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q4/f944.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1994/Q2/f506.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1994/Q4/f612.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q1/f1838.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2012/Q2/f1764.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2010/Q1/f684.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q4/f176.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q4/f150.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2012/Q3/f832.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1997/Q1/f967.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q4/f1733.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2008/Q2/f383.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1995/Q2/f1572.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q4/f1241.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q4/f1111.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q2/f1911.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1998/Q4/f1468.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q4/f1122.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q2/f1147.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2015/Q4/f1445.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2006/Q1/f1649.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q1/f1615.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2008/Q3/f1947.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2007/Q3/f1913.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1995/Q3/f1432.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2015/Q2/f353.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q2/f838.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2011/Q1/f1145.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2010/Q1/f1111.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q3/f1443.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1997/Q4/f676.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2011/Q4/f89.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1994/Q1/f1893.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2015/Q1/f1168.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q1/f1134.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q1/f441.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q3/f1924.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1995/Q2/f341.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q2/f1430.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q3/f969.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q1/f1123.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1997/Q1/f1157.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1999/Q3/f1455.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1998/Q3/f1421.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2007/Q4/f654.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1999/Q2/f1159.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q4/f624.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2010/Q2/f287.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1992/Q2/f1583.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1994/Q4/f1881.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2007/Q3/f18.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q4/f59.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q3/f738.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q4/f1298.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1995/Q1/f1740.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1995/Q4/f1264.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2002/Q4/f299.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q1/f467.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q1/f1751.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1993/Q3/f1262.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1992/Q1/f1287.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2007/Q1/f945.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2012/Q1/f87.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1994/Q3/f1585.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1999/Q4/f214.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q1/f258.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2002/Q4/f112.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1997/Q2/f1742.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1998/Q2/f1776.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q4/f1603.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q2/f550.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q2/f584.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2015/Q2/f1753.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q3/f712.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q3/f507.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q1/f698.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1998/Q4/f445.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1997/Q3/f422.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q4/f204.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q4/f1433.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q2/f695.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q1/f1456.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q1/f1745.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q3/f573.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q4/f855.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q2/f1424.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q4/f61.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q1/f606.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2010/Q4/f1575.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q4/f1116.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1991/Q3/f1596.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q1/f1479.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2002/Q1/f1411.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2006/Q1/f591.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1996/Q2/f20.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1993/Q4/f379.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2014/Q2/f873.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q2/f84.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2001/Q1/f57.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q1/f361.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2000/Q3/f1148.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2013/Q1/f206.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1995/Q1/f489.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1992/Q4/f1564.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2005/Q2/f1447.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1999/Q4/f280.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2010/Q4/f327.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1990/Q3/f1207.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q4/f85.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1994/Q4/f799.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2008/Q4/f423.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2003/Q2/f715.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2004/Q3/f58.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2011/Q2/f996.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2012/Q1/f437.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/2011/Q2/f520.parquet], ReadEntryWithPath [path=/tmp/DRILL_4589/1993/Q3/f300.parquet], ReadEntryWithP |
+------+------+
1 row selected (26.19 seconds)
Details of directory structure and size in bytes
There are 26 sub-directories with each sub directory having four more sub-directories Q1,Q2,Q3 and Q4
Each such directory having 2000 small parquet files.
[root@centos-01 ~]# hadoop fs -du /tmp/DRILL_4589 178702459 /tmp/DRILL_4589/.drill.parquet_metadata 112420427 /tmp/DRILL_4589/1990 112433621 /tmp/DRILL_4589/1991 112433621 /tmp/DRILL_4589/1992 112433621 /tmp/DRILL_4589/1993 112433621 /tmp/DRILL_4589/1994 112433621 /tmp/DRILL_4589/1995 112433621 /tmp/DRILL_4589/1996 112433621 /tmp/DRILL_4589/1997 112433621 /tmp/DRILL_4589/1998 112433621 /tmp/DRILL_4589/1999 112433621 /tmp/DRILL_4589/2000 112433621 /tmp/DRILL_4589/2001 112433621 /tmp/DRILL_4589/2002 112433621 /tmp/DRILL_4589/2003 112433621 /tmp/DRILL_4589/2004 112433621 /tmp/DRILL_4589/2005 112433621 /tmp/DRILL_4589/2006 112433621 /tmp/DRILL_4589/2007 112433621 /tmp/DRILL_4589/2008 112433621 /tmp/DRILL_4589/2009 112433621 /tmp/DRILL_4589/2010 112433621 /tmp/DRILL_4589/2011 112433621 /tmp/DRILL_4589/2012 112433621 /tmp/DRILL_4589/2013 112433621 /tmp/DRILL_4589/2014 112433621 /tmp/DRILL_4589/2015 total size in bytes of DRILL_4589 directory = 3101633561 => 3.1GB
Test result from 1.7.0-SNAPSHOT git commit ID: f7197596
on 4 node Centos cluster
0: jdbc:drill:schema=dfs.tmp> select max(dir0), max(dir1), max(dir2) from `DRILL_4589`; +---------+---------+---------+ | EXPR$0 | EXPR$1 | EXPR$2 | +---------+---------+---------+ | 2015 | Q4 | null | +---------+---------+---------+ 1 row selected (38.05 seconds)
Query plan for above query from Drill 1.7.0 note that usedMetadataFile=true in the query plan
0: jdbc:drill:schema=dfs.tmp> explain plan for select max(dir0), max(dir1), max(dir2) from `DRILL_4589`;
+------+------+
| text | json |
+------+------+
| 00-00 Screen
00-01 Project(EXPR$0=[$0], EXPR$1=[$1], EXPR$2=[$2])
00-02 StreamAgg(group=[{}], EXPR$0=[MAX($0)], EXPR$1=[MAX($1)], EXPR$2=[MAX($2)])
00-03 UnionExchange
01-01 StreamAgg(group=[{}], EXPR$0=[MAX($0)], EXPR$1=[MAX($1)], EXPR$2=[MAX($2)])
01-02 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///tmp/DRILL_4589]], selectionRoot=/tmp/DRILL_4589, numFiles=1, usedMetadataFile=true, columns=[`dir0`, `dir1`, `dir2`]]])
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