our client notified us that a scheduled job ran on the 15th December 2017 and it took longer than expected. Checking the processed jobs and their submitted dates, I couldn't find any job running on the 15th December, although the job has been scheduled for running daily. It shows that it ran from 28th December.
How can I check, for example via a SOQL query, if the APEX job really ran on the 15th December and how long it took to run?.
I would appreciate any help here.