Re: Database Caching

"Greg Sabino Mullane" <greg@turnstep.com> writes:
> III. Relation caching

> The final cache is the relation itself, and simply involves putting the entire 
> relation into memory. This cache has a field for the name of the relation, 
> the table info itself, the type (indexes should ideally be cached more than 
> tables, for example), the access time, and the acccess number. Loading could 
> be done automatically, but most likely should be done according to a flag 
> on the table itself or as an explicit command by the user.

This would be a complete waste of time; the buffer cache (both Postgres'
own, and the kernel's disk cache) serves the purpose already.

As I've commented before, I have deep misgivings about the idea of a
query-result cache, too.
        regards, tom lane