Mathstodon.xyz is now running Mastodon 2.2 and on a beefier machine. Normal service should be resumed.
For reference: we're now on vultr's 4GB RAM plan. The asset compilation stages completed nice and quickly instead of taking ~15 minutes, so we might finally have found the correct specs to run Mastodon.
It looks like the federated timeline has caught up, so we're back on track