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Re: Effect of large text field data on queries



Glen Parker <glenebob(at)nwlink(dot)com> writes:
> How much of a TOAST'd field is actually stored in the main heap table? 
> Is there a way to configure that amount?

A pushed-out-of-line value is replaced by a 20-byte pointer structure.
There's no such thing as partially out-of-line.  See
http://www.postgresql.org/docs/8.1/static/storage-toast.html

			regards, tom lane



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