Mountkirk Games’ gaming servers are not automatically scaling properly. Last month, they rolled out a new feature, which suddenly became very popular. A record number of users are trying to use the service, but many of them are getting 503 errors and very slow response times. What should they investigate first?

A. Verify that the database is online

B. Verify that the project quota hasn’t been exceeded

C. Verify that the new feature code did not introduce any performance bugs
D. Verify that the load-testing team is not running their tool against production

Explanation: 503 is service unavailable error. If the database was online everyone would get the 503 error.