ClickHouse/tests/performance/uniq.xml

<test max_ignored_relative_change="0.7">

    <preconditions>
        <table_exists>hits_100m_single</table_exists>
        <ram_size>30000000000</ram_size>
    </preconditions>



    <settings>
        <max_memory_usage>30000000000</max_memory_usage>
    </settings>

    <substitutions>
        <substitution>
           <name>key</name>
           <values>
               <!--
                    1 as a key doesn't make much sense - the queries are either
                    too long in case of uniqExact or too short in case of limited
                    uniq, so the result is drowned by the noise.
                    <value>1</value>
                -->
               <value>SearchEngineID</value>
               <value>RegionID</value>
               <value>SearchPhrase</value>
               <value>ClientIP</value>
           </values>
       </substitution>
        <substitution>
           <name>func</name>
           <values>
               <value>sum</value>
               <value>uniq</value>
               <value>uniqExact</value>
               <value>uniqHLL12</value>
               <value>uniqCombined(12)</value>
               <value>uniqCombined(13)</value>
               <value>uniqCombined(14)</value>
               <value>uniqCombined(15)</value>
               <value>uniqCombined(16)</value>
               <value>uniqCombined(17)</value>
               <value>uniqCombined(18)</value>
               <value>uniqUpTo(3)</value>
               <value>uniqUpTo(5)</value>
               <value>uniqUpTo(10)</value>
               <value>uniqUpTo(25)</value>
               <value>uniqUpTo(100)</value>
           </values>
       </substitution>
    </substitutions>

    <query>SELECT {key} AS k, {func}(UserID) FROM hits_100m_single GROUP BY k FORMAT Null</query>
</test>