Good point. I would note this issue. Thanks for the advice :). Regards,
Don On Wed, Feb 4, 2009 at 6:09 PM, Simon Riggs <si...@2ndquadrant.com> wrote: > > On Wed, 2009-02-04 at 14:42 +0800, Don Marvick wrote: > > > 4. any other issue needs consideration? > > Most attempts to improve sorting further have fallen to nothing because > of the lack of repeatable test results. In particular, coming up with > test cases *after* writing the code is a good way to get lost in > discussions and have your work passed over. > > The best starting point is to collect a number of test cases, both > typical and extreme cases. Do some research to show that "typical" cases > really are that and be prepared for some expressions of reasonable > doubt. Publish that data so test results can be objectively verified and > then measure those cases on existing code, with various settings of > tunable parameters. > > Then it will be a simple matter to prove your changes are effective in > target cases without damaging other cases. We would also want the > changes to work automatically without additional tunable parameters. > > -- > Simon Riggs www.2ndQuadrant.com > PostgreSQL Training, Services and Support > >
