os_* server settings - ClickHouse Documentation

These settings configure the ClickHouse server and are autogenerated from ClickHouse source.

os_collect_psi_metrics

Enable accounting PSI metrics from /proc/pressure/ files.

os_cpu_busy_time_threshold

Threshold of OS CPU busy time in microseconds (OSCPUVirtualTimeMicroseconds metric) to consider CPU doing some useful work, no CPU overload would be considered if busy time was below this value.

Last modified on July 22, 2026