> > Check out those figures for context switches! 30,000 switches per second
> > with only three runnable processes and practically no block I/O seems
> > quite high to me. You can also see that the system is spending half its
> ..
> > Is this a scheduler worst-case, something to be expected, or something I
> > can work around?
>
> The scheduler is _good_ at the three process case. Run some straces it looks
> more like postgres is doing wacky yield based locks.
The scheduler that Linus merged in 2.5.2-pre3 will solve the problem.
- Davide
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