This issue has been resolved since 08:07 UTC. We continue to investigate the root cause and put in place changes to ensure this does not repeat.

We have identified an issue with an underlying database index affecting a limited number of queries. We are now processing background jobs at a reduced rate and monitoring performance.

We are seeing increased response time from our primary database, and are stopping processing of background jobs while we investigate the issue. This will delay the delivery of emails and real time notifications.