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Re: 7.4.6 pg_dump failed

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Marty Scholes <marty(at)outputservices(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: 7.4.6 pg_dump failed
Date: 2005-01-26 21:32:55
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
I wrote:
>> You might have better luck if you didn't use -d.

After looking into it, the above seems to be sound advice.  pg_dump
appears to make several (three or four) copies of a wide field value
when using -d or -D mode, but only one copy when using the default
COPY mode.  I made a minor change in 8.0 sources to get rid of one
extra copy step, but getting it below three copies looks to be

In any case it'd be a good idea to increase the data-segment ulimit
setting you are using for both the postmaster and pg_dump, if you intend
to push multi-hundred-meg field values around.

			regards, tom lane

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