Re: Pre-allocated free space for row updating (like PCTFREE)

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Cc: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Satoshi Nagayasu <nagayasus(at)nttdata(dot)co(dot)jp>
Subject: Re: Pre-allocated free space for row updating (like PCTFREE)
Date: 2005-08-23 15:55:00
Message-ID: 200508230855.00962.josh@agliodbs.com
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Jim, Satoshi,

> It should be possible to see what the crossover point is in terms of
> benefit using dbt2 and tweaking the transactions that are run, something
> I can do if there's interest. But I agree with Satoshi; if there are
> people who will benefit from this option (which doesn't hurt those who
> choose not to use it), why not put it in?

Because your predicate is still disputed? That is, we don't know that people
will benefit yet -- pgbench is a pretty useless benchmark for real
performance comparisons.

Satoshi, if you can package up a patch on current CVS, I'll throw it at DBT2.

--
Josh Berkus
Aglio Database Solutions
San Francisco

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