Re: 2.4.17 absurd number of context switches

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Fri Dec 28 2001 - 12:02:09 EST


> 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.

Alan
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