Andrew Sherman created IMPALA-10588:
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Summary: PlannerTest/resource-requirements.test fails with bad mem
estimates (from number of files?)
Key: IMPALA-10588
URL: https://issues.apache.org/jira/browse/IMPALA-10588
Project: IMPALA
Issue Type: Bug
Affects Versions: Impala 4.0
Reporter: Andrew Sherman
We see an unexpected plan in the plan for "select * from tpch_orc_def.lineitem"
with Hive v3.
The first line to diff isÂ
{code}
Per-Host Resource Estimates: Memory=188MB
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
{code}
but in the scan we see
{code}
HDFS partitions=1/1 files=1 size=142.84MB
{code}
instead of the expectedÂ
{code}
HDFS partitions=1/1 files=5 size=142.72MB
{code}
Could this be a regression from the recent change IMPALA-10503 which changed
data loading?
{code}
Section PLAN of query:
select * from tpch_orc_def.lineitem
Actual does not match expected result:
Max Per-Host Resource Reservation: Memory=12.00MB Threads=2
Per-Host Resource Estimates: Memory=188MB
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Analyzed query: SELECT * FROM tpch_orc_def.lineitem
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
| Per-Host Resources: mem-estimate=188.00MB mem-reservation=12.00MB
thread-reservation=2
PLAN-ROOT SINK
| output exprs: tpch_orc_def.lineitem.l_orderkey,
tpch_orc_def.lineitem.l_partkey, tpch_orc_def.lineitem.l_suppkey,
tpch_orc_def.lineitem.l_linenumber, tpch_orc_def.lineitem.l_quantity,
tpch_orc_def.lineitem.l_extendedprice, tpch_orc_def.lineitem.l_discount,
tpch_orc_def.lineitem.l_tax, tpch_orc_def.lineitem.l_returnflag,
tpch_orc_def.lineitem.l_linestatus, tpch_orc_def.lineitem.l_shipdate,
tpch_orc_def.lineitem.l_commitdate, tpch_orc_def.lineitem.l_receiptdate,
tpch_orc_def.lineitem.l_shipinstruct, tpch_orc_def.lineitem.l_shipmode,
tpch_orc_def.lineitem.l_comment
| mem-estimate=100.00MB mem-reservation=4.00MB spill-buffer=2.00MB
thread-reservation=0
|
00:SCAN HDFS [tpch_orc_def.lineitem]
HDFS partitions=1/1 files=1 size=142.84MB
stored statistics:
table: rows=6.00M size=142.84MB
columns: all
extrapolated-rows=disabled max-scan-range-rows=6.00M
mem-estimate=88.00MB mem-reservation=8.00MB thread-reservation=1
tuple-ids=0 row-size=231B cardinality=6.00M
in pipelines: 00(GETNEXT)
Expected:
Max Per-Host Resource Reservation: Memory=12.00MB Threads=2
Per-Host Resource Estimates: Memory=140MB
Analyzed query: SELECT * FROM tpch_orc_def.lineitem
F00:PLAN FRAGMENT [UNPARTITIONED] hosts=1 instances=1
| Per-Host Resources: mem-estimate=140.00MB mem-reservation=12.00MB
thread-reservation=2
PLAN-ROOT SINK
| output exprs: tpch_orc_def.lineitem.l_orderkey,
tpch_orc_def.lineitem.l_partkey, tpch_orc_def.lineitem.l_suppkey,
tpch_orc_def.lineitem.l_linenumber, tpch_orc_def.lineitem.l_quantity,
tpch_orc_def.lineitem.l_extendedprice, tpch_orc_def.lineitem.l_discount,
tpch_orc_def.lineitem.l_tax, tpch_orc_def.lineitem.l_returnflag,
tpch_orc_def.lineitem.l_linestatus, tpch_orc_def.lineitem.l_shipdate,
tpch_orc_def.lineitem.l_commitdate, tpch_orc_def.lineitem.l_receiptdate,
tpch_orc_def.lineitem.l_shipinstruct, tpch_orc_def.lineitem.l_shipmode,
tpch_orc_def.lineitem.l_comment
| mem-estimate=100.00MB mem-reservation=4.00MB spill-buffer=2.00MB
thread-reservation=0
|
00:SCAN HDFS [tpch_orc_def.lineitem]
HDFS partitions=1/1 files=5 size=142.72MB
stored statistics:
table: rows=6.00M size=142.72MB
columns: all
extrapolated-rows=disabled max-scan-range-rows=1.73M
mem-estimate=40.00MB mem-reservation=8.00MB thread-reservation=1
tuple-ids=0 row-size=231B cardinality=6.00M
in pipelines: 00(GETNEXT)
{code}
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