Re: NOT LIKE much faster than LIKE?

От: Andrea Arcangeli
Тема: Re: NOT LIKE much faster than LIKE?
Дата: ,
Msg-id: 20060111075956.GU15897@opteron.random
(см: обсуждение, исходный текст)
Ответ на: Re: NOT LIKE much faster than LIKE?  (Tom Lane)
Список: pgsql-performance

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NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
 Re: NOT LIKE much faster than LIKE?  (Tom Lane, )
  Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
   Re: NOT LIKE much faster than LIKE?  (Christopher Kings-Lynne, )
    Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
   Re: NOT LIKE much faster than LIKE?  (Tom Lane, )
    Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
     Re: NOT LIKE much faster than LIKE?  (Greg Stark, )
    Re: NOT LIKE much faster than LIKE?  (Matteo Beccati, )
     Re: NOT LIKE much faster than LIKE?  (Tom Lane, )
      Re: NOT LIKE much faster than LIKE?  (Simon Riggs, )
       Re: NOT LIKE much faster than LIKE?  (Tom Lane, )
        Re: NOT LIKE much faster than LIKE?  (Simon Riggs, )
         Re: NOT LIKE much faster than LIKE?  (Tom Lane, )
          Re: NOT LIKE much faster than LIKE?  (Simon Riggs, )
           Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
        Re: NOT LIKE much faster than LIKE?  (Simon Riggs, )
   Re: NOT LIKE much faster than LIKE?  (Stephan Szabo, )
 Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
  Re: NOT LIKE much faster than LIKE?  (Tom Lane, )
   Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
 Re: NOT LIKE much faster than LIKE?  ("Jim C. Nasby", )
  Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
   Re: NOT LIKE much faster than LIKE?  (Andrea Arcangeli, )
   Re: NOT LIKE much faster than LIKE?  ("Jim C. Nasby", )
    Re: NOT LIKE much faster than LIKE?  (Tom Lane, )

On Tue, Jan 10, 2006 at 10:46:53AM -0500, Tom Lane wrote:
> Not with that data, but maybe if you increased the statistics target for
> the column to 100 or so, you'd catch enough values to get reasonable
> results.

Sorry, I'm not expert with postgresql, could you tell me how to increase
the statistic target?

In another email you said you applied a patch to CVS, please let me know
if you've anything to test for me, and I'll gladly test it immediately
(I've a sandbox so it's ok even if it corrupts the db ;).

Thanks!


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