On 12/11/2013 01:44 AM, Greg Stark wrote:
> On Wed, Dec 11, 2013 at 12:40 AM, Simon Riggs <si...@2ndquadrant.com> wrote:
>> When we select a block we should read all rows on that block, to help
>> identify the extent of clustering within the data.
> So how do you interpret the results of the sample read that way that
> doesn't introduce bias?
Initially/experimentally we could just compare it to our current approach :)

That is, implement *some* block sampling and then check it against what
we currently have. Then figure out the bad differences. Rinse. Repeat.


Hannu Krosing
PostgreSQL Consultant
Performance, Scalability and High Availability
2ndQuadrant Nordic OÜ

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