Not sure where to start here, but trying to diagnose why after an upgrade
from 3.8.8 to 4.0.0 things have slowed down tremendously. Doing even
pedestrian tasks such as loading the home screen or opening the ticket
search will about 30% of the time decide it wants to max out the cpu with
the apache2 process for roughly 20 - 30 seconds. Sometimes, loading things
happens almost instantaneously. Other times, there's this weird delay. Not
sure where to start looking, are there any known issues that I might need to
be aware of?