ClickHouse/tests/performance/mmap_io.xml
2021-08-30 00:18:38 +03:00

19 lines
663 B
XML

<test>
<preconditions>
<table_exists>test.hits</table_exists>
</preconditions>
<settings>
<local_filesystem_read_method>mmap</local_filesystem_read_method>
<min_bytes_to_use_mmap_io>1</min_bytes_to_use_mmap_io>
</settings>
<create_query>CREATE TABLE hits_none (WatchID UInt64 CODEC(NONE)) ENGINE = MergeTree ORDER BY tuple()</create_query>
<fill_query>INSERT INTO hits_none SELECT WatchID FROM test.hits</fill_query>
<fill_query>OPTIMIZE TABLE hits_none FINAL</fill_query>
<query short="1"><![CDATA[SELECT sum(WatchID) FROM hits_none]]></query>
<drop_query>DROP TABLE hits_none</drop_query>
</test>