| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Ron Johnson <ron(dot)l(dot)johnson(at)cox(dot)net>, PgSQL Performance ML <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: performance of insert/delete/update |
| Date: | 2002-11-23 20:48:14 |
| Message-ID: | 200211231248.14863.josh@agliodbs.com |
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| Lists: | pgsql-hackers pgsql-performance |
Tom,
> As an example: in testing INSERT speed on my old HP box just now,
> I got measured rates of about 16000 inserts/minute with fsync off, and
> 5700/min with fsync on (for 1 INSERT per transaction). Knowing that my
> disk drive is 6000 RPM, the latter number is credible. On my PC I get
> numbers way higher than the disk rotation rate :-(
Thanks for the info. As long as I have your ear, what's your opinion on the
risk level of running with fsynch off on a production system? I've seen a
lot of posts on this list opining the lack of danger, but I'm a bit paranoid.
--
-Josh Berkus
Aglio Database Solutions
San Francisco
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