Search Postgresql Archives

Re: Why won't it index scan?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tuesday May 23 2006 4:55 pm, Jim C. Nasby wrote:
> Well, I did find one reason not to go ape with this: the
> number of pages analyzed scales with the number of buckets, so
> doubling the statistics target will roughly double the ANALYZE
> time for any table over 6000 pages (though the effect isn't
> linear, see below). There is a small increase in time for a
> small table, but I doubt it's enough for anyone to care:

Are you accounting for your well-primed OS and DB caches?  I'd 
think a more realistic test would clear those of the target 
table between measurements.

Ed


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux