Re: [WIP] cache estimates, cache access cost

Excerpts from Cédric Villemain's message of mar jun 14 10:29:36 -0400 2011:

> Attached are updated patches without the plugin itself. I've also
> added the cache_page_cost GUC, this one is not per tablespace, like
> others page_cost.
> 
> There are 6 patches:
> 
> 0001-Add-reloscache-column-to-pg_class.patch

Hmm, do you really need this to be a new column?  Would it work to have
it be a reloption?

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Álvaro Herrera <alvherre@commandprompt.com>
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