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Abbreviate verbose clickhouse logs. #10443

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Abbreviate verbose clickhouse logs. #10443

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22 changes: 22 additions & 0 deletions smf/clickhouse/config.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,28 @@
<flush_interval_milliseconds>10000</flush_interval_milliseconds>
</query_log>

<!--
Mask long queries generated by oximeter.

As of this writing, oximeter builds queries like

SELECT * FROM oximeter.measurements_* WHERE timeseries_key IN (...)

where the IN clause contains thousands of elements. A single oximeter
query can generate multiple queries of this form. We observe that
these queries comprise ~80% of the `system.query_log` table, which is
itself one of the largest tables in terms of compressed disk use.
This block truncates this long query pattern, since it's not
operationally useful and consumes a significant amount of disk.
-->
<query_masking_rules>
<rule>
<name>truncate large timeseries_key IN clauses</name>
<regexp>(\btimeseries_key\s+IN\s*\()[^)]{120,}\)</regexp>
<replace>\1...)</replace>
</rule>
</query_masking_rules>

<metric_log>
<database>system</database>
<table>metric_log</table>
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