6.1: kern.ipc.maxpipekva

Maxim Konovalov maxim at macomnet.ru
Sat Jun 17 20:38:10 UTC 2006


On Sat, 17 Jun 2006, 17:23-0300, Marc G. Fournier wrote:

> On Sat, 17 Jun 2006, Maxim Konovalov wrote:
>
> > On Sat, 17 Jun 2006, 16:44-0300, Marc G. Fournier wrote:
> >
> > >
> > > Jun 17 16:00:03 pluto kernel: kern.ipc.maxpipekva exceeded; see tuning(7)
> > > Jun 17 16:00:04 pluto kernel: kern.ipc.maxpipekva exceeded; see tuning(7)
> >
> > I thought about removing this reference but then decided that better
> > to add a couple of words to tuning(7) man page (and didn't add).
> >
> > > but I can't seem to find anything in tuning(7) about it ... so, what
> > > is it and how do I monitor for it?
> >
> > kern/sys_pipe.c:
> >
> > * In order to limit the resource use of pipes, two sysctls exist:
> > *
> > * kern.ipc.maxpipekva - This is a hard limit on the amount of pageable
> > * address space available to us in pipe_map. This value is normally
> > * autotuned, but may also be loader tuned.
> > *
> > * kern.ipc.pipekva - This read-only sysctl tracks the current amount of
> > * memory in use by pipes.
>
> See my other note, but I take it just adding:
>
> kern.ipc.maxpipekva=25165824
>
> and reboot is the wrong thing to do, since the server didn't come back :(

Increase KVA_PAGES, see /sys/i386/conf/NOTES for details.

-- 
Maxim Konovalov


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