ClickHouse/tests/config/config.d/graphite.xml

<clickhouse>
    <graphite_rollup>
        <version_column_name>Version</version_column_name>
        <pattern>
            <regexp>sum</regexp>
            <function>sum</function>
            <retention>
                <age>0</age>
                <precision>600</precision>
            </retention>
            <retention>
                <age>172800</age> <!-- 2 days -->
                <precision>6000</precision>
            </retention>
        </pattern>
        <default>
            <function>max</function>
            <retention>
                <age>0</age>
                <precision>600</precision>
            </retention>
            <retention>
                <age>172800</age>
                <precision>6000</precision>
            </retention>
        </default>
    </graphite_rollup>
</clickhouse>