Re: RE: [COMMITTERS] pgsql/src/backend/access/transam ( xact.c xlog.c)

* Don Baccus <dhogaza@pacifier.com> [001116 13:46]:
> At 02:13 PM 11/16/00 -0500, Bruce Momjian wrote:
> 
> >> I think the default should probably be no delay, and the documentation
> >> on enabling this needs to be clear and obvious (i.e. hard to miss).
> >
> >I just talked to Tom Lane about this.  I think a sleep(0) just before
> >the flush would be the best.  It would reliquish the cpu slice if
> >another process is ready to run.  If no other backend is running, it
> >probably just returns.  If there is another one, it gives it a chance to
> >complete.  On return from sleep(0), it can check if it still needs to
> >flush.  This would tend to bunch up flushers so they flush only once,
> >while not delaying cases where only one backend is running.
> 
> This sounds like an interesting approach, yes.
Question: Is sleep(0) guaranteed to at least give up control? 

The way I read my UnixWare 7's man page, it might not, since alarm(0)
just cancels the alarm...

Larry
> 
> 
> 
> - Don Baccus, Portland OR <dhogaza@pacifier.com>
>   Nature photos, on-line guides, Pacific Northwest
>   Rare Bird Alert Service and other goodies at
>   http://donb.photo.net.
-- 
Larry Rosenman                      http://www.lerctr.org/~ler
Phone: +1 972-414-9812 (voice) Internet: ler@lerctr.org
US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749