php-fpm.conf

[xxx]
listen = 127.0.0.1:9000

listen.allowed_clients = 127.0.0.1
user = xxx
group = xxx
pm = static
pm.max_children = 5
pm.start_servers = 1
pm.min_spare_servers = 1
pm.max_spare_servers = 3
pm.max_requests = 50

slowlog = /path/to/xxx-slow.log

php_admin_value[error_log] = /path/to/xxx-error.log
php_admin_flag[log_errors] = on