I'll be honest. I am using my ElasticSearch powered Mastodon search more than Google, et al, now.
I followed #Flipboard's relay, which adds a lot of content from their magazines that link to sites as well as some other relays. I think they are the culprit for my now fixed long pull queues. Today there was no backlog. First time since I followed their relay.
Soon I'll need to work on database optimization, which will probably move it from this server.