Perhaps I am missing something, but the documentation on external
storage appears remarkably sparse. It says it is better for substring
searches, but otherwise doesn't say very much.
I have a table with two modest-length bytea fields (around 9K and 2K
respectively) of already compressed data. I was looking for a clue as to
whether or not these should use external storage - I suspect they should
but I didn't see anything that gave me a definite answer.
I'd prepare doc updates on this if they were required but I don't have
the requisite knowledge, nor time right now to go trawling endlessly to
pgsql-hackers by date
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|Subject: Re: adding support for posix_fadvise()|