After upgrading to 8.4, I'm noticing that the httpd process occasionally spikes the server load up between 50 and 90, effectively bringing it down. Whenever I bounce the httpd process, the server almost instantly becomes more responsive, which is why I think it's httpd, but it could very well be the mysqld process as well. My question is this: how can I determine which site is causing the issue? Running 'top' doesn't show any process consuming excess memory or processor, so tracking it that way isn't feasible. Any advice would be appreciated.