v.21.6Improvement

Allow Configuring Different Log Levels for Logging Channels

Allow configuring different log levels for different logging channels. Closes #19569. #23857 (filimonov).
Configurable Log Levels per Logging Channel: ClickHouse now allows users to set different log levels for individual logging channels.

Why it matters

This feature enables finer control over logging output by allowing users to specify distinct verbosity levels for separate logging components. It improves log clarity and helps target relevant information without overwhelming logs with less relevant details.

How to use it

Users can configure log levels for specific channels by editing the logging configuration file, setting the desired log level for each channel separately. This allows selective adjustment of verbosity, for example, setting one channel to DEBUG and another to ERROR.