Multiple 404 and database connection error

Hi we are managing multiple portals using cloudflare , all are wordpress , we have enabled the full cache .
We are getting multiple 404 or database connection error .

Please help .

also if full cache on , still there is request that goes to source server ?

Are these intermittent? 404 errors should show up in your server logs to show why the request failed.

DB Connection errors can be caused by configuring your site to a hostname that’s set to :orange:. Cloudflare doesn’t proxy DB traffic.

Cloudflare default caching will send all page requests to the server. “Full” cache isn’t a Cloudflare setting. The Cache page has options ranging from Query strings, to Standard. Page Rules have options ranging from Bypass to Cache Everything.