Service Unavailable 503 Error - my website is occasionally redirecting
I am on the Deluxe Linux Hosting with cPanel which is meant to handle moderate traffic, however I noticed that my website is occasionally redirecting to a 503 error, for hours at a time, even when there is no traffic (monitored by google analytics and cPanel). During this time, I noticed that the stats on cPanel show that either my memory is maxed out or my I/O Usage is maxed, or both.
How is this possible, with no traffic or files being processes in the background? Please can you review and check what exactly is causing this issue? I cannot afford to have any downtime on my website as it is an ecommerce store I am about to market it on social media to generate traffic for my business.
Your prompt assistance in the regard would be highly appreciated.