...and it's back. sorry about that. looks like long-lived queries to fix the schema to support more than 2^32 rows stopped autovacuums from running, which meant we hit a 2^32 txn id wraparound instead. 🙃
Can you write a blogpost about this that explains the issue, and how to mitigate it?
@matrix lol I was wonder what happened.
mastodon.matrix.org is one server in the network