From: Scott Marlowe <smarlowe@g2switchworks.com>
To: John Vincent <lusis.org@gmail.com>
Cc: PGSQL Performance <pgsql-performance@postgresql.org>
Subject: Re: Performance of pg_dump on PGSQL 8.0
Date: Wed, 14 Jun 2006 16:03:35 -0500
Message-ID: <1150319015.26538.45.camel@state.g2switchworks.com> (raw)
In-Reply-To: <c841561b0606141359g5a0cefa7j8641486f1787445b@mail.gmail.com>
References: <44902165.7020502@lusis.org>
<1150303450.26538.9.camel@state.g2switchworks.com>
<c841561b0606141111g9244024oc091c58ecf0e1d94@mail.gmail.com>
<c841561b0606141256j11605d51m67abfd8467ceae1e@mail.gmail.com>
<c841561b0606141359g5a0cefa7j8641486f1787445b@mail.gmail.com>
How long does gzip take to compress this backup?
On Wed, 2006-06-14 at 15:59, John Vincent wrote:
> Okay I did another test dumping using the uncompressed backup on the
> system unloaded and the time dropped down to 8m for the backup.
> There's still the size issue to contend with but as I said, I've got a
> fair bit of space left on the SAN to work with.
>
> On 6/14/06, John Vincent <pgsql-performance@lusis.org> wrote:
> Well I did a test to answer my own question:
>
> -rw-r--r-- 1 postgres postgres 167M Jun 14 01:43
> claDW_PGSQL-20060613170001.bak
> -rw-r--r-- 1 root root 2.4G Jun 14 14:45
> claDW_PGSQL.test.bak
>
> the claDW_PGSQL database is a subset of the data in the main
> schema that I'm dealing with.
>
> I did several tests using -Fc -Z0 and a straight pg_dump with
> no format option.
>
> The file size is about 1300% larger and takes just as long to
> dump even for that small database.
>
> Interestingly enough gzip compresses about 1M smaller with no
> gzip options.
>
> I don't know that the uncompressed is really helping much. I'm
> going to run another query when there's no other users on the
> system and see how it goes.
>
>
>
> --
> John E. Vincent
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To: pgsql-performance@postgresql.org
Cc: smarlowe@g2switchworks.com, lusis.org@gmail.com
Subject: Re: Performance of pg_dump on PGSQL 8.0
In-Reply-To: <1150319015.26538.45.camel@state.g2switchworks.com>
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