kern.ipc.maxpipekva exceeded; see tuning(7)

Kip Macy kmacy at freebsd.org
Thu Nov 13 18:49:19 PST 2008


I don't know off hand how you could end up with that many pipes.
Nonetheless, sys_pipe.c has a good explanation of what that does and
how pipe sizing works.

-Kip

On Thu, Nov 13, 2008 at 9:37 PM, Bruce Simpson <bms at incunabulum.net> wrote:
> I just got lots and lots of this:
>   kern.ipc.maxpipekva exceeded; see tuning(7)
>
> However, tuning(7) on my system has no information about this tunable
> whatsoever.
>
> anglepoise:~ % uname -a
> FreeBSD anglepoise.lon.incunabulum.net 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE
> #3: Tue Nov  4 15:40:44 GMT 2008
> root at anglepoise.lon.incunabulum.net:/home/obj/usr/src/sys/ANGLEPOISE7  amd64
> anglepoise:~ % sysctl kern.ipc.maxpipekva
> kern.ipc.maxpipekva: 20971520
>
> I was running a couple of copies of "synergys" at the time. After killing
> them, all seems fine,  however this was causing most binaries on the system
> to error out with ENOMEM.
>
> Any ideas?
> BMS
>
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