All the sites have their own php-fpm pools with its domain name:
`php-fpm: pool domain.tld`
But what for php-fpm pool www is used?
`php-fpm: pool www`
A php-fpm pool www is not used by Plesk, it is created by default during
php-fpm package installation. Its configuration file is located at:
# cat /etc/php5/fpm/pool.d/www.conf
It can be safety disabled. To disble it set
pm = ondemand in /etc/php5/fpm/pool.d/www.conf :
#grep pm /etc/php5/fpm/pool.d/www.conf
pm = ondemand
In this case pool will not be created during
php-fpm start and will not be created lately because Plesk does not use it.