Re: our friend the win32 system timer.

Merlin Moncure wrote:
> Depending on how you look at it, this may be a semi-serious problem in
> win32.  pg uses the C library time routines to calculate elapsed time
> and supply values.
> 
> Unfortunately, this value is only updated for each timeslice allocated
> to the thread.  The resolution of this timer is about 10 ms...
> 
> This means that a table with a timestamp column defaulted to now() and a
> unique constraint on that column will have a very high chance of
> constraint violations.  This might happen when reading in values from a
> script, and it works fine on Linux.
> 
> A side issue is that psql analyze timings are not useful below 10 ms.
> Should the win32 high performance counter, QueryPerformanceCounter, be
> introduced?

This seems like a very minor limitation to me.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  [email protected]               |  (610) 359-1001
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