I don&#x27;t think that&#x27;s very good advice in a heavily-loaded shared hosting environment.  A disk read could easily stall for tens of seconds, just because the kernel whimsically decided to throw out the cache (or because your server crowded its memory container).  I actually don&#x27;t want any server touching a disk while it&#x27;s serving.  Everything should be read before service begins and never again.