How to Kill your Drupal Site: Database Cache
Quick note here: I'm working with Drupal 8--although, the process documented here is more or less the same for Drupal 7 or even Drupal 9...
I recently ran some Drupal module updates on our Development site; one of those updates required a database update--namely, the Google Tag Manager module. I brought down the branch with module updates onto my localhost and then imported a copy of my Production database to continue the work on my computer. Upon loading the site, I encountered an unexpected error: