Aryeh Gregor wrote:
Part of the problem is that the measure of job queue length we really care about is "what was the last job executed?", not "how many jobs are in the queue?". If we added a job_timestamp column and put an index on it, we could replace (or supplement) the cruddy poor-quality estimate we have now with a probably more useful and certainly more accurate one.
Agree. Adding job queue lag to Special:Statistics would benefit both users and sysadmins.