Lemmy Support

I started a private instance today, and maybe I'm being impatient but I'd like to know if there's something I can do on my end to keep my instance more closely in sync with the remote communities I've subscribed to. I don't seem to be missing any new posts, but there are so many missing comments which makes the sort options (Active, Hot) bring up posts that sometimes are weeks old. Are there any configuration options or tuning options that could help my instance "keep up"?