Our servers don't have any performance issues at this time, but as
they are all virtual servers I keep this in the back of my mind. My logic is.
Web service 11S files. Files don’t change but if there was a security vulnerability I would hate to have a web server where the public files were not protected. (Full AV Protection)
PHP. Not directly open to public and does a lot of processing of files, so over protective AV product could slow this down. (AV Scan each night, but no scanning of each process)
File Store. Our student bring about 20 viruses a day onto our network. They will upload files with viruses. I did play with CLAMAV, but I found our Kaspersky AV more reliable for picking up viruses in a test Environment. (Full AV Protection)
MySQL db. This runs on a separate server and it not open to the public (directly anyway). As per PHP it does a lot of processing and
could slow everything down. (AV Scan each night, but no scanning of each process)
I would like to hear if other people have different ideas as well.