ClickHouse: Monitoring Performance of Refreshable Materialized Views

Refreshable Materialized Views (RMV) are a way to define scheduled data transformations in ClickHouse. A materialized view definition becomes an RMV by adding a REFRESH clause to the DDL like so: CREATE TABLE ukp_bytown ( town LowCardinality ( String ), total UInt32 ) ENGINE = MergeTree ORDER BY ( town ); CREATE MATERIALIZED VIEW rmv_ukp REFRESH EVERY 5 SECOND TO ukp_bytown AS SELECT town , sum (…