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Csaba Ringhofer updated IMPALA-7367: ------------------------------------ Labels: performance (was: perfomance) > Pack StringValue, CollectionValue and TimestampValue slots > ---------------------------------------------------------- > > Key: IMPALA-7367 > URL: https://issues.apache.org/jira/browse/IMPALA-7367 > Project: IMPALA > Issue Type: Improvement > Components: Backend > Reporter: Tim Armstrong > Assignee: Pooja Nilangekar > Priority: Major > Labels: performance > Fix For: Impala 3.2.0 > > Attachments: 0001-WIP.patch > > > This is a follow-on to finish up the work from IMPALA-2789. IMPALA-2789 > didn't actually fully pack the memory layout because StringValue, > TimestampValue and CollectionValue still occupy 16 bytes but only have 12 > bytes of actual data. This results in a higher memory footprint, which leads > to higher memory requirements and worse performance. We don't get any benefit > from the padding since the majority of tuples are not actually aligned in > memory anyway. > I did a quick version of the change for StringValue only which improves TPC-H > performance. > {noformat} > Report Generated on 2018-07-30 > Run Description: "b5608264b4552e44eb73ded1e232a8775c3dba6b vs > f1e401505ac20c0400eec819b9196f7f506fb927" > Cluster Name: UNKNOWN > Lab Run Info: UNKNOWN > Impala Version: impalad version 3.1.0-SNAPSHOT RELEASE () > Baseline Impala Version: impalad version 3.1.0-SNAPSHOT RELEASE (2018-07-27) > +----------+-----------------------+---------+------------+------------+----------------+ > | Workload | File Format | Avg (s) | Delta(Avg) | GeoMean(s) | > Delta(GeoMean) | > +----------+-----------------------+---------+------------+------------+----------------+ > | TPCH(10) | parquet / none / none | 2.69 | -4.78% | 2.09 | > -3.11% | > +----------+-----------------------+---------+------------+------------+----------------+ > +----------+----------+-----------------------+--------+-------------+------------+------------+----------------+-------------+-------+ > | Workload | Query | File Format | Avg(s) | Base Avg(s) | > Delta(Avg) | StdDev(%) | Base StdDev(%) | Num Clients | Iters | > +----------+----------+-----------------------+--------+-------------+------------+------------+----------------+-------------+-------+ > | TPCH(10) | TPCH-Q22 | parquet / none / none | 0.94 | 0.93 | > +0.75% | 3.37% | 2.84% | 1 | 30 | > | TPCH(10) | TPCH-Q13 | parquet / none / none | 3.32 | 3.32 | > +0.13% | 1.74% | 2.09% | 1 | 30 | > | TPCH(10) | TPCH-Q11 | parquet / none / none | 0.99 | 0.99 | > -0.02% | 3.74% | 3.16% | 1 | 30 | > | TPCH(10) | TPCH-Q5 | parquet / none / none | 2.30 | 2.33 | > -0.96% | 2.15% | 2.45% | 1 | 30 | > | TPCH(10) | TPCH-Q2 | parquet / none / none | 1.55 | 1.57 | > -1.45% | 1.65% | 1.49% | 1 | 30 | > | TPCH(10) | TPCH-Q8 | parquet / none / none | 2.89 | 2.93 | > -1.51% | 2.69% | 1.34% | 1 | 30 | > | TPCH(10) | TPCH-Q9 | parquet / none / none | 5.96 | 6.06 | > -1.63% | 1.34% | 1.82% | 1 | 30 | > | TPCH(10) | TPCH-Q20 | parquet / none / none | 1.58 | 1.61 | > -1.85% | 2.28% | 2.16% | 1 | 30 | > | TPCH(10) | TPCH-Q16 | parquet / none / none | 1.18 | 1.21 | > -2.11% | 3.68% | 4.72% | 1 | 30 | > | TPCH(10) | TPCH-Q3 | parquet / none / none | 2.13 | 2.18 | > -2.31% | 2.09% | 1.92% | 1 | 30 | > | TPCH(10) | TPCH-Q15 | parquet / none / none | 1.86 | 1.90 | > -2.52% | 2.06% | 2.22% | 1 | 30 | > | TPCH(10) | TPCH-Q17 | parquet / none / none | 1.85 | 1.90 | > -2.86% | 10.00% | 8.02% | 1 | 30 | > | TPCH(10) | TPCH-Q10 | parquet / none / none | 2.58 | 2.66 | > -2.93% | 1.68% | 6.49% | 1 | 30 | > | TPCH(10) | TPCH-Q14 | parquet / none / none | 1.37 | 1.42 | > -3.22% | 3.35% | 6.24% | 1 | 30 | > | TPCH(10) | TPCH-Q18 | parquet / none / none | 4.99 | 5.17 | > -3.38% | 1.75% | 3.82% | 1 | 30 | > | TPCH(10) | TPCH-Q6 | parquet / none / none | 0.66 | 0.69 | > -3.73% | 5.04% | 4.12% | 1 | 30 | > | TPCH(10) | TPCH-Q4 | parquet / none / none | 1.07 | 1.12 | > -3.97% | 1.79% | 2.85% | 1 | 30 | > | TPCH(10) | TPCH-Q1 | parquet / none / none | 2.29 | 2.39 | > -4.34% | 2.70% | 3.43% | 1 | 30 | > | TPCH(10) | TPCH-Q7 | parquet / none / none | 6.17 | 6.45 | > -4.42% | 2.15% | 1.69% | 1 | 30 | > | TPCH(10) | TPCH-Q19 | parquet / none / none | 1.85 | 1.93 | > -4.42% | 2.76% | 2.26% | 1 | 30 | > | TPCH(10) | TPCH-Q12 | parquet / none / none | 1.32 | 1.42 | > -6.75% | 2.55% | 3.56% | 1 | 30 | > | TPCH(10) | TPCH-Q21 | parquet / none / none | 10.43 | 12.08 | > -13.69% | * 14.21% * | * 10.76% * | 1 | 30 | > +----------+----------+-----------------------+--------+-------------+------------+------------+----------------+-------------+-------+ > {noformat} -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org