mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-29 19:12:03 +00:00
73676f5022
* simplify reading in order of sorting key
* add perf test for reading many parts
* Revert "simplify reading in order of sorting key"
This reverts commit 7267d7c46e.
* add threshold for preliminary merge for reading in order
* better threshold
* limit threads in test
33 lines
1.5 KiB
XML
33 lines
1.5 KiB
XML
<test>
|
|
<settings>
|
|
<optimize_aggregation_in_order>1</optimize_aggregation_in_order>
|
|
<optimize_read_in_order>1</optimize_read_in_order>
|
|
<max_partitions_per_insert_block>200</max_partitions_per_insert_block>
|
|
<max_threads>8</max_threads>
|
|
</settings>
|
|
|
|
<substitutions>
|
|
<substitution>
|
|
<name>table</name>
|
|
<values>
|
|
<value>mt_20_parts</value>
|
|
<value>mt_200_parts</value>
|
|
</values>
|
|
</substitution>
|
|
</substitutions>
|
|
|
|
<create_query>CREATE TABLE mt_20_parts(id UInt32, val1 UInt32, val2 UInt32) ENGINE = MergeTree ORDER BY val1 PARTITION BY id % 20</create_query>
|
|
<create_query>CREATE TABLE mt_200_parts(id UInt32, val1 UInt32, val2 UInt32) ENGINE = MergeTree ORDER BY val1 PARTITION BY id % 200</create_query>
|
|
|
|
<fill_query>INSERT INTO mt_20_parts SELECT number, rand() % 10000, rand() FROM numbers_mt(100000000)</fill_query>
|
|
<fill_query>INSERT INTO mt_200_parts SELECT number, rand() % 10000, rand() FROM numbers_mt(100000000)</fill_query>
|
|
<fill_query>OPTIMIZE TABLE mt_20_parts FINAL</fill_query>
|
|
<fill_query>OPTIMIZE TABLE mt_200_parts FINAL</fill_query>
|
|
|
|
<query>SELECT val2 FROM {table} ORDER BY val1 LIMIT 100 FORMAT Null</query>
|
|
<query>SELECT val2 FROM {table} ORDER BY val1 LIMIT 100000 FORMAT Null</query>
|
|
<query>SELECT sum(val2) FROM {table} GROUP BY val1 FORMAT Null</query>
|
|
|
|
<drop_query>DROP TABLE IF EXISTS {table}</drop_query>
|
|
</test>
|