$ php-fpm -tt
[...]
[14-Apr-2022 15:41:49] NOTICE: 	pm = dynamic
[14-Apr-2022 15:41:49] NOTICE: 	pm.max_children = 50
[14-Apr-2022 15:41:49] NOTICE: 	pm.start_servers = 15
[14-Apr-2022 15:41:49] NOTICE: 	pm.min_spare_servers = 15
[14-Apr-2022 15:41:49] NOTICE: 	pm.max_spare_servers = 25
[14-Apr-2022 15:41:49] NOTICE: 	pm.process_idle_timeout = 10
[...]