Re: Joel's Performance Issues WAS : Opteron vs Xeon

От: Kevin Brown
Тема: Re: Joel's Performance Issues WAS : Opteron vs Xeon
Дата: ,
Msg-id: 20050423063044.GI19518@filer
(см: обсуждение, исходный текст)
Ответ на: Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Jim C. Nasby")
Ответы: Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Josh Berkus)
Список: pgsql-performance

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Re: Opteron vs Xeon (Was: What to do with 6 disks?)  ("Anjan Dave", )
 Re: Opteron vs Xeon (Was: What to do with 6 disks?)  ("Joel Fradkin", )
  Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Josh Berkus, )
   Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Joel Fradkin", )
    Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Josh Berkus, )
     Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Vivek Khera, )
    Re: Joel's Performance Issues WAS : Opteron vs Xeon  (John A Meinel, )
     Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Joel Fradkin", )
      Re: Joel's Performance Issues WAS : Opteron vs Xeon  (John A Meinel, )
       Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Tom Lane, )
        Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Joel Fradkin", )
       Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Joel Fradkin", )
        Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Jim C. Nasby", )
         Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Kevin Brown, )
          Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Josh Berkus, )
           Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Kevin Brown, )
            Re: Joel's Performance Issues WAS : Opteron vs Xeon  ("Jim C. Nasby", )
      Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Josh Berkus, )
      Re: Joel's Performance Issues WAS : Opteron vs Xeon  (Andreas Pflug, )

Jim C. Nasby wrote:
> Hrm... I was about to suggest that for timing just the query (and not
> output/data transfer time) using explain analyze, but then I remembered
> that explain analyze can incur some non-trivial overhead with the timing
> calls. Is there a way to run the query but have psql ignore the output?
> If so, you could use \timing.

Would timing "SELECT COUNT(*) FROM (query)" work?


--
Kevin Brown                          


В списке pgsql-performance по дате сообщения:

От: Greg Stark
Дата:
Сообщение: Re: Bad n_distinct estimation; hacks suggested?
От: "Joel Fradkin"
Дата:
Сообщение: Re: Joel's Performance Issues WAS : Opteron vs Xeon