Sam 2b8d4508e5 PERF: stop running background work between requests
Use a dedicated thread to run Scheduler::Defer

This avoids blocking of a worker during operations that require waiting.

In particular uploads risked blocking a unicorn.

This also add a queue "length" that discourse prometheus consumes.
2017-11-23 15:48:47 +11:00
..
2016-05-31 07:57:28 +10:00
2017-07-28 10:20:09 +09:00