From time to time the site will get very very slow to load, from 350ms to almost 10seconds and in the logs will see something like:
[Fri Sep 29 13:29:11.019399 2017] [proxy_fcgi:error] [pid 8307:tid 140556948657920] (104)Connection reset by peer: [client 70.69.151.65:53397] AH01075: Error...