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From "Mujtaba Chohan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-3560) Aggregate query performance is worse with encoded columns for large number of columns
Date Tue, 03 Jan 2017 23:11:58 GMT
Mujtaba Chohan created PHOENIX-3560:
---------------------------------------

             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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