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Re: PostgreSQL 8.4 performance tuning questions

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
Cc: "Matthew Wakeling" <matthew(at)flymine(dot)org>, pgsql-performance(at)postgresql(dot)org
Subject: Re: PostgreSQL 8.4 performance tuning questions
Date: 2009-07-30 17:28:15
Message-ID: 15122.1248974895@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-performance
"Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> writes:
> Since the dump to custom format ran longer than the full pg_dump
> piped directly to psql would have taken, the overall time to use this
> technique is clearly longer for our databases on our hardware.

Hmmm ... AFAIR there isn't a good reason for dump to custom format to
take longer than plain text dump, except for applying compression.
Maybe -Z0 would be worth testing?  Or is the problem that you have to
write the data to a disk file rather than just piping it?

			regards, tom lane

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