Aryeh Gregor wrote:
If too many are accumulating, it's probably due to a programming error that needs to be found and fixed by human inspection. (Tim just made several commits fixing things that were spewing out too many jobs.)
(Obviously, the length of the job queue needs to be added to whatever diagnostic screen the devs first check when the site slows down, otherwise it won't help much.)
#wikimedia-tech has enough people that regular warnings posted there would probably get noticed.
People did complain about long job queue on #wikimedia-tech. I don't think they were taken too seriously.