On Mon, Oct 19, 2009 at 4:21 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> marcin mank <marcin.mank@gmail.com> writes:
>>> This proposal is just "hints by the back door", ISTM. As Tom says, there is
>>> a justification for having it on tablespaces but not on individual tables.
>
>> If the parameter is defined as "the chance that a page is in cache"
>> there is very real physical meaning to it.
>
> We have no such parameter...
And we want our parameters to be things the DBA has a chance of being
able to estimate. How would you come up with sensible figures for this
hypothetical parameter?
--
greg
