Re: Help with tuning this query (with explain analyze finally)

From: Dave Held
Subject: Re: Help with tuning this query (with explain analyze finally)
Date: ,
Msg-id: 49E94D0CFCD4DB43AFBA928DDD20C8F90261845C@asg002.asg.local
(view: Whole thread, Raw)
List: pgsql-performance

> -----Original Message-----
> From: Tom Lane [mailto:]
> Sent: Wednesday, March 02, 2005 4:30 PM
> To: Ken Egervari
> Cc: ;
> 
> Subject: Re: [PERFORM] Help with tuning this query (with
> explain analyze
> finally)
>
> [...]
> Well, what it suggests is that gettimeofday() is only
> returning a result good to the nearest millisecond.  (Win32
> hackers, does that sound right?)

No.  There's no such thing as gettimeofday() in Win32.  So it
must be making some other call, or perhaps an emulation.

> [...]
> Most modern machines seem to have clocks that can count elapsed
> time down to near the microsecond level.  Anyone know if it's
> possible to get such numbers out of Windows, or are we stuck with
> milliseconds?

QueryPerformanceCounter() is your friend.

http://lists.boost.org/MailArchives/boost/msg45626.php

__
David B. Held
Software Engineer/Array Services Group
200 14th Ave. East,  Sartell, MN 56377
320.534.3637 320.253.7800 800.752.8129


pgsql-performance by date:

From: Mark Kirkwood
Date:
Subject: Re: Help with tuning this query
From: John A Meinel
Date:
Subject: Re: Help with tuning this query (more musings)