5xx Server errors
507 Insufficient Storage
The server doesn't have the space to finish the request.
Common causes
- A full disk on the server.
How to fix it
- Free disk space: old logs, uploads or backups are common culprits.
Find out the moment your site returns 507
Spot Downtime monitors count this as down and alert you, since visitors see an error. (The public “Is it down?” checker treats 4xx answers from big sites as online, because many refuse automated requests.)