Originally Posted by zerovic

If so, make sure to backup your core files before updating to 4.5..

last night after updating one of my sites, it started showing an 500 internal server error, and after the investigation we've found out that each and every visitor used up at least 300MB of RAM on each page load..

not sure if it's a bug in the release or the update process got stuck somewhere in the process, but re-uploading 4.4.2 fixed the issue..

anyways, keep your eyes on your sites a after updating.

have a great day,
z