On Fri, Aug 12, 2011 at 1:26 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> But it will be
> a loser to apply the optimization to data sets that would otherwise
> have fit in shared_buffers.
Spoiling the cache is a bad plan, even if it makes the current query faster.
I think we should make the optimisation stronger still and use
FADV_DONT_NEED on blocks that fall from the ring buffer. Spoiling the
OS cache is a problem as well.
--
Simon Riggs http://www.2ndQuadrant.com/
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