From: Steve Crawford <scrawford@pinpointresearch.com>
To: Craig James <cjames@emolecules.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Two identical systems, radically different performance
Date: Mon, 08 Oct 2012 15:16:05 -0700
Message-ID: <507350A5.2080503@pinpointresearch.com> (raw)
In-Reply-To: <CAFwQ8rcvw4mSoJ9q+ouONCeB9dg1T9gAUV5J27MpVZrehRHayQ@mail.gmail.com>
References: <CAFwQ8rcvw4mSoJ9q+ouONCeB9dg1T9gAUV5J27MpVZrehRHayQ@mail.gmail.com>
On 10/08/2012 02:45 PM, Craig James wrote:
> This is driving me crazy. A new server, virtually identical to an old
> one, has 50% of the performance with pgbench. I've checked everything
> I can think of.
>
> The setups (call the servers "old" and "new"):
>
> old: 2 x 4-core Intel Xeon E5620
> new: 4 x 4-core Intel Xeon E5606
>
> both:
>
> memory: 12 GB DDR EC
> Disks: 12x500GB disks (Western Digital 7200RPM SATA)
> 2 disks, RAID1: OS (ext4) and postgres xlog (ext2)
> 8 disks, RAID10: $PGDATA
Exact same model of disk, same on-board cache, same RAID-card RAM size,
same RAID strip-size, etc.??
Cheers,
Steve
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To: pgsql-performance@postgresql.org
Cc: scrawford@pinpointresearch.com, cjames@emolecules.com
Subject: Re: Two identical systems, radically different performance
In-Reply-To: <507350A5.2080503@pinpointresearch.com>
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