[grk]

The problem with postgres-backed queues is they can't be used with connection pooling, so your workers are unnecessarily using up DB connections.

[waffle_maniac]

I thought that was an ActiveRecord problem. We use MYSQL and have a lot of long-lived connections.

[grk]

Not sure how it works with MySQL, but with postgres the most common pooling options use transactional mode, which doesn't support LISTEN/NOTIFY.