Re: Two tables or three?

James Cloos <cloos@jhcloos.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