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Posted to dev@phoenix.apache.org by "Mujtaba Chohan (JIRA)" <ji...@apache.org> on 2017/01/03 23:11:58 UTC
[jira] [Created] (PHOENIX-3560) Aggregate query performance is
worse with encoded columns for large number of columns
Mujtaba Chohan created PHOENIX-3560:
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Summary: Aggregate query performance is worse with encoded columns for large number of columns
Key: PHOENIX-3560
URL: https://issues.apache.org/jira/browse/PHOENIX-3560
Project: Phoenix
Issue Type: Sub-task
Reporter: Mujtaba Chohan
Assignee: Samarth Jain
Schema with 5K columns
{noformat}
create table (k1 integer, k2 integer, c1 varchar ... c5000 varchar CONSTRAINT PK PRIMARY KEY (K1, K2))
VERSIONS=1, MULTI_TENANT=true, IMMUTABLE_ROWS=true
{noformat}
In this test, there are no null columns and each column contains 200 chars i.e. 1MB of data per row.
Count * aggregation is about 5X slower with encoded columns when compared to table non-encoded columns using the same schema.
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