Screenshot: Screenshot by Lightshot - happens everyday at the same exact time and for the life of me, I can not figure out what is causing this spike. The CPU load shoots to 30+ and lasts for 15-20 minutes and everything goes back to normal again. My first thought was a plugin so I disabled them all for 24 hours and it still happen - I monitored traffic with How to sniff HTTP traffic from the command line on Linux - Xmodulo and it was moving extremely fast and I monitored with How to sniff HTTP traffic from the command line on Linux - Xmodulo and it said the file being hit the hardest was admin-ajax.php so I disabled that from within functions.php and it still didn't do anything Think DDoS maybe? But why such a short burst and then just die and go back to normal. A DDoS is usually continuous until it crashes the VPS but this VPS doesn't crash even under a 30+ load average - It slows down to a crawl but it doesn't crash.