Re: Initial prefetch performance testing

Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:

> On Mon, 2008-09-22 at 16:46 +0100, Gregory Stark wrote:
>
>> Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
>>
>> > I'd prefer to set this as a tablespace level storage parameter.
>>
>> Sounds, like a good idea, except... what's a tablespace level storage parameter?
>
> A storage parameter, just at tablespace level.
>
> WITH (storage_parameter = value)

I still think this is a good idea but I still think there are unanswered
questions about it. Surely whatever we do with this parameter also holds for
random_page_cost and sequential_page_cost as well?

Should they remain GUC parameters at all? If so, how would setting any of them
locally interact with the tablespace parameter for tables used in the query?

--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's 24x7 Postgres support!