My developer added the patch to our 4 websites, which are all on one dedicated server. Since the addition, the sites randomly don't load (all of them). And the host said:
The CPU resources were maxed out which froze everything up, this appears to have stopped after restarting the services but we are monitoring at this time to see if it happens again.
When they do this it works fine...but eventually doesn't load again. Could they be connected?
This has nothing to do with Patches Installation.
There is a possibility that you have installed not compatible patches which has caused this.
Two of our sites are on different versions than one of them. Are you saying there are different patches for this depending on the version? Do you have a link to this? I may have to talk to our developer to see what they implemented. Thanks for the help!
Checkout our blog for the proper installation of the patches,
SECURITY DISCLAIMER: The above website contains Magento Security Patch files which are self-hosted by the user and as such unsafe. Magento Forum advise all users to only download patch files from the official Magento Downloads page.
You can also check article where we have Github repositories with commits before and after patched files for 1.6.x-1.9.x