Php-fpm.sock failed error after upgrading to matomo 4.11

I’m having the following error when there is high traffic on my website for around 5% of events since I upgraded to Matomo 4.11:

connect() to unix:/run/php/php-fpm.sock failed (11: Resource temporarily unavailable) while connecting to upstream

This is logged here: /srv/encrypted_fs/nginx/error.log
I don’t see any error in /var/log/php7.4-fpm.log
I’ve looked at potential solutions but I already have a high number of max_children.
This is my /etc/php/7.4/fpm/pool.d/www.conf file:

user = www-data
group = www-data

listen = /run/php/php7.4-fpm.sock

listen.owner = www-data = www-data

pm = static
pm.max_children = 768
pm.start_servers = 20
pm.min_spare_servers = 10
pm.max_spare_servers = 30
pm.max_requests = 1200

How can I fix this?
Thank you!

I saw this:

I think this is more related to php.fpm than Matomo… :wink: