James Cloos <cloos(at)jhcloos(dot)com> writes:
> I'm designing a schema for an app that requires two large blobs per
> row. Given that querying does not hit those, I presume it is
> beneficial to move the blobs out of the main table.
You shouldn't contort your schema artificially in order to do that.
Postgres automatically stores wide fields out-of-line, so if "large"
means "more than a couple KB after compression" then the system will do
this behind the scenes and there's no need for you to do it. See
http://developer.postgresql.org/docs/postgres/storage-toast.html
regards, tom lane