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Re: [ADMIN] Processing very large TEXT columns (300MB+) using C/libpq - Mailing list pgsql-admin

From Tom Lane
Subject Re: [ADMIN] Processing very large TEXT columns (300MB+) using C/libpq
Date
Msg-id 4750.1508518522@sss.pgh.pa.us
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In response to Re: [ADMIN] Processing very large TEXT columns (300MB+) using C/libpq  (Cory Nemelka <cnemelka@gmail.com>)
Responses Re: [ADMIN] Processing very large TEXT columns (300MB+) using C/libpq  (Bear Giles <bgiles@coyotesong.com>)
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Cory Nemelka <cnemelka@gmail.com> writes:
> Yes, but I should be able to read them much faster.  The psql client can
> display an 11MB column in a little over a minute, while in C using libpg
> library, it takes over an hour.

Well, of course psql relies on libpq, so it seems unlikely that libpq
itself is where the time is going.  Have you tried applying a profiler?
"perf" or "oprofile" or similar tool ought to pinpoint the culprit
pretty easily.
        regards, tom lane


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