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Merge pull request #10345 from Vxider/mv_parallel_insert_pt

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Add performance test for parallel insert of materialized view
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alexey-milovidov 2020-04-18 18:39:22 +03:00 committed by GitHub
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tests/performance/materialized_view_parallel_insert.xml Normal file
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<test>
<preconditions>
<table_exists>hits_10m_single</table_exists>
</preconditions>
<create_query>
CREATE MATERIALIZED VIEW hits_mv ENGINE MergeTree
PARTITION BY toYYYYMM(EventDate)
ORDER BY (CounterID, EventDate, intHash32(UserID))
SAMPLE BY intHash32(UserID)
SETTINGS
parts_to_delay_insert = 5000,
parts_to_throw_insert = 5000
AS
-- don't select all columns to keep the run time down
SELECT CounterID, EventDate, UserID, Title
FROM hits_10m_single
-- do not select anything because we only need column types
LIMIT 0
</create_query>
<fill_query>SET max_insert_threads=8</fill_query>
<fill_query>SYSTEM STOP MERGES</fill_query>
<query>
INSERT INTO hits_mv
SELECT CounterID, EventDate, UserID, Title
FROM hits_10m_single
</query>
<drop_query>SYSTEM START MERGES</drop_query>
<drop_query>DROP TABLE IF EXISTS hits_mv</drop_query>
</test>