Re: Insert Performance

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Michael Paesold" <mpaesold(at)gmx(dot)at>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Insert Performance
Date: 2002-09-25 22:06:55
Message-ID: 28498.1032991615@sss.pgh.pa.us
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"Michael Paesold" <mpaesold(at)gmx(dot)at> writes:
> To insert another 10562 rows takes about 12 minutes now!!!

> As I said I wrote a function to insert the rows (PL/pgSQL). All values were
> inserted inside a single function call; I always though that a function call
> would be executed inside a transaction block. Experience says it does.

Well, there's something fishy about your results. Using CVS tip I see
about a 4-to-1 difference between COPYing 10000 rows and INSERT'ing
10000 rows (as one transaction). That's annoyingly high, but it's still
way lower than what you're reporting ...

I used the contents of table tenk1 in the regression database for test
data, and dumped it out with "pg_dump -a" with and without -d. I then
just timed feeding the scripts to psql ...

regards, tom lane

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