Re: ANALYZE sampling is too good
От | Jim Nasby |
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Тема | Re: ANALYZE sampling is too good |
Дата | |
Msg-id | 52A7A340.9070801@nasby.net обсуждение исходный текст |
Ответ на | Re: ANALYZE sampling is too good (Peter Geoghegan <pg@heroku.com>) |
Ответы |
Re: ANALYZE sampling is too good
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Список | pgsql-hackers |
On 12/10/13 2:17 PM, Peter Geoghegan wrote: > On Tue, Dec 10, 2013 at 11:59 AM, Greg Stark <stark@mit.edu> wrote: >> But I don't really think this is the right way to go about this. >> Research papers are going to turn up pretty specialized solutions that >> are probably patented. We don't even have the basic understanding we >> need. I suspect a basic textbook chapter on multistage sampling will >> discuss at least the standard techniques. > > I agree that looking for information on block level sampling > specifically, and its impact on estimation quality is likely to not > turn up very much, and whatever it does turn up will have patent > issues. We have an entire analytics dept. at work that specializes in finding patterns in our data. I might be able to get some timefrom them to at least provide some guidance here, if the community is interested. They could really only serve in a consultingrole though. -- Jim C. Nasby, Data Architect jim@nasby.net 512.569.9461 (cell) http://jim.nasby.net
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