Re: pg_dump & performance degradation

From: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
To: Don Baccus <dhogaza(at)pacifier(dot)com>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org, brianb-pggeneral(at)edsamail(dot)com
Subject: Re: pg_dump & performance degradation
Date: 2000-08-01 04:31:28
Message-ID: 3.0.5.32.20000801143128.02e34bc0@mail.rhyme.com.au
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At 21:12 31/07/00 -0700, Don Baccus wrote:
>At 01:06 PM 8/1/00 +1000, Philip Warner wrote:
>
>>I agree; it's definitely a non-critical feature. But then, it is only 80
>>lines of code in one place (including 28 non-code lines). I am not totally
>>happy with the results it produces, so I have no objection to removing it
>>all. I just need some more general feedback...
>
>Have you tried pg_dump on a multi-processor machine, which most serious
>database-backed websites run on these days? Do you see the same performance
>degradation? My site runs on a dual P450 with RAID 1 LVD disks, and cost
>me exactly $2100 to build (would've been less if I'd laid off the extra
>cooling fans!)

The original request came from a person with a "4-CPU Xeon with 2GB of
RAM", but the "solution" does not seem to work for them (I think), so it's
probably a waste of time.

>Doing such unheard of things to a utility (again, is there any Unix or NT
>or VMS etc utility that has such a user option?) makes me think you're
>finger-pointing at the wrong part of your service.

I agree; I think in an earlier post I did say that I was trying to 'fix' an
OS issue in the application, which is really not a good thing to do...but
there *is* a problem. Just no solution, apparently.

>But, then again, I'm the kinda guy that looks for simple solutions to simple
>problems...

It was simple when I started. Honest...

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