Re: 2.4.19pre2aa1

Daniel Phillips
2002-03-07T11:51:39Z

On March 7, 2002 12:47 pm, William Lee Irwin III wrote:
> On March 7, 2002 11:49 am, William Lee Irwin III wrote:
> >> 4096 threads blocked on I/O is already approaching or exceeding the
> >> scalability limits of other core kernel subsystems.
>
> On Thu, Mar 07, 2002 at 12:27:41PM +0100, Daniel Phillips wrote:
> > I think he meant that with larger ram it's easy to justify making the wait
> > table a little looser, to gain a tiny little bit of extra performance.
> > That seems perfectly reasonable to me. Oh, and there's also the observation
> > that machines with larger ram tend to be more heavily loaded with processes,
> > just because one can.
>
> And these processes will not be waiting on pages as often, either, as
> pages will be more plentiful.
>
> From the reports I've seen, typical numbers of waiters on pages, even
> on large systems, are as much as an order of magnitude fewer in number
> than 4096. It would seem applications need to wait on pages less with
> the increased memory size.

Uh Yup.

--
Daniel