> I don't think the on-disk size matters all that much, TBH, it's likely just a tiny fraction of data stored in the cluster. I've seen pg_attribute take up ver

> I don't think the on-disk size matters all that much, TBH, it's likely just a tiny fraction of data stored in the cluster. I've seen pg_attribute take up very significant fractions of the database numerous times, so I do think the on-disk size can matter. And there's plenty places, e.g. catcache, where we store the full on-disk tuple (rather than just the fixed-length prefix); so the on-disk size is actually quite relevant for the in-memory bit too.