| From: | Curt Sampson <cjs(at)cynic(dot)net> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "J(dot) R(dot) Nield" <jrnield(at)usol(dot)com>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL Hacker <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Index Scans become Seq Scans after VACUUM ANALYSE |
| Date: | 2002-06-25 05:08:59 |
| Message-ID: | Pine.NEB.4.43.0206251406390.17448-100000@angelic.cynic.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Mon, 24 Jun 2002, Tom Lane wrote:
> There are a lot of other things we desperately need to spend time
> on that would not amount to re-engineering large quantities of OS-level
> code. Given that most Unixen have perfectly respectable disk management
> subsystems, we prefer to tune our code to make use of that stuff, rather
> than follow the "conventional wisdom" that databases need to bypass it.
> ...
> Oracle can afford to do that sort of thing because they have umpteen
> thousand developers available. Postgres does not.
Well, Oracle also started out, a long long time ago, on systems without
unified buffer cache and so on, and so they *had* to write this stuff
because otherwise data would not be cached. So Oracle can also afford to
maintain it now because the code already exists.
cjs
--
Curt Sampson <cjs(at)cynic(dot)net> +81 90 7737 2974 http://www.netbsd.org
Don't you know, in this new Dark Age, we're all light. --XTC
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