Обсуждение: Avoid using swap in a cluster

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?

--
   Richard Huxton
   Archonet Ltd

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
>
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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
>