From: Luke Lonergan <llonergan@greenplum.com>
To: Merlin Moncure <merlin.moncure@rcsonline.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Hardware/OS recommendations for large databases (
Date: Tue, 15 Nov 2005 10:46:12 -0800
Message-ID: <BF9F6CF4.13B4D%llonergan@greenplum.com> (raw)
In-Reply-To: <6EE64EF3AB31D5448D0007DD34EEB3417DD898@Herge.rcsinc.local>
Merlin,
On 11/15/05 7:20 AM, "Merlin Moncure" <merlin.moncure@rcsonline.com> wrote:
>
> It's hard to say what would be better. My gut says the 5u box would be
> a lot better at handling high cpu/high concurrency problems...like your
> typical business erp backend. This is pure speculation of course...I'll
> defer to the experts here.
With Oracle RAC, which is optimized for OLTP and uses a shared memory
caching model, maybe or maybe not. I¹d put my money on the SMP in that case
as you suggest, but what happens when the OS dies?
For data warehousing, OLAP and decision support applications, RAC and other
shared memory/disk architectures don¹t do you any good and the SMP machine
is better by a bit.
However, if you have an MPP database, where disk and memory are not shared,
then the SMP machine is tens or hundreds of times slower than the cluster of
the same price.
- Luke
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: llonergan@greenplum.com, merlin.moncure@rcsonline.com
Subject: Re: Hardware/OS recommendations for large databases (
In-Reply-To: <BF9F6CF4.13B4D%llonergan@greenplum.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox