Table size clickhouse
Show disk usage per table in a database
clickhouse-client -q "SELECT table, formatReadableSize(sum(bytes)) AS size FROM system.parts WHERE active AND database='mydb' GROUP BY table ORDER BY sum(bytes) DESC"
more clickhouse
all 17 commands →
Running queries
clickhouse-client -q 'SELECT query_id, user, elapsed, query FROM system.processes ORDER BY elapsed DESC'
Kill query
clickhouse-client -q "KILL QUERY WHERE query_id='<id>'"
Drop caches
clickhouse-client -q 'SYSTEM DROP MARK CACHE; SYSTEM DROP UNCOMPRESSED CACHE'
Sync replica
clickhouse-client -q 'SYSTEM SYNC REPLICA mydb.myTable'
Connect and run a query
clickhouse-client --host ch.example.com --user default --password secret -q 'SELECT version()'