Re: Avoid using swap in a cluster

From: Alex Stapleton <alexs(at)advfn(dot)com>
To: Richard Huxton <dev(at)archonet(dot)com>
Cc: Ricardo Humphreys <ricardoainati(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Avoid using swap in a cluster
Date: 2005-09-02 11:18:22
Message-ID: 1C0688FA-8D0D-4862-B416-C2574FD284BC@advfn.com
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On 2 Sep 2005, at 10:42, Richard Huxton wrote:

> Ricardo Humphreys wrote:
>
>> Hi all.
>> In a cluster, is there any way to use the main memory of the
>> other nodes instead of the swap? If I have a query with many sub-
>> queries and a lot of data, I can easily fill all the memory in a
>> node. The point is: is there any way to continue using the main
>> memory from other nodes in the same query instead of the swap?
>>
>
> I don't know of any clustered version of PG that can spread queries
> over multiple machines. Can I ask what you are using?

IIRC GreenPlums DeepGreen MPP (Version 2) can do it. It does cost
money though, but it is a very nice product.

> --
> Richard Huxton
> Archonet Ltd
>
> ---------------------------(end of
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> TIP 9: In versions below 8.0, the planner will ignore your desire to
> choose an index scan if your joining column's datatypes do not
> match
>

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