Re: Two identical systems, radically different performance

From: Claudio Freire <klaussfreire(at)gmail(dot)com>
To: Craig James <cjames(at)emolecules(dot)com>
Cc: Evgeny Shishkin <itparanoia(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Two identical systems, radically different performance
Date: 2012-10-08 22:09:45
Message-ID: CAGTBQpZnkU7n4iAhiNzN3rsMW2WT+H6YpN7c7bkNbfj+3hr6NA@mail.gmail.com
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On Mon, Oct 8, 2012 at 7:06 PM, Craig James <cjames(at)emolecules(dot)com> wrote:
>> Sequential Input on the new one is 279MB/s, on the old 400MB/s.
>>
>
> But why? What have I overlooked?

Do you have readahead properly set up on the new one?

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