Simon Riggs wrote:
> On Tue, Jun 14, 2011 at 7:28 PM, Bruce Momjian <bruce@momjian.us> wrote:
> > Simon Riggs wrote:
> >> Currently, the planner and executor are mostly independent of each
> >> other: the planner doesn't really know when the plan will be executed,
> >> and the executor doesn't know how recently the plan was made.
> >>
> >> We can work out the various paths through the traffic cop to see when
> >> a plan will be a "one-shot" - planned and then executed immediately,
> >> then discarded.
> >
> > I was also hoping someday allow plans that are to be immediately
> > executed to probe the buffer cache to determine how expensive index
> > scans would be.
>
> Yes, it opens up many optimizations, both for cache sensitivity and
> dynamic data access.
>
> But those are later ideas based on the existence of this first step.
Agreed.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ It's impossible for everything to be true. +
