On Thu, Aug 17, 2017 at 12:06 AM, Dilip Kumar <dilipbalaut@gmail.com> wrote:
> I have attempted a very simple POC with this approach just to see how
> many lossy pages we can save if we lossify all the pages falling in
> the same chunk first, before moving to the next page. I have taken
> some data on TPCH scale 20 with different work_mem (only calculated
> lossy pages did not test performance). I did not see a significant
> reduction in lossy pages. (POC patch attached with the mail in case
> someone is interested to test or more experiment).
That's not an impressive savings. Maybe this approach is a dud, and
we should go back to just tackling the planner end of it.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
