Re: looks like apple fixed /etc/rc

decibel(at)phonebook(dot)1[12:31]~:1%sysctl kern.sysv.shmmax
kern.sysv.shmmax: 1024000000

It wouldn't surprise me at all if there was some other black magic at
work here. What I do know is that I had to comment out the sysctl line
in my /etc/rc to get that value to stick. I didn't make notes during my
testing (booting to single user), but if memory serves I was able to do
this:

sysctl -w kern.sysv.shmmax=1024000000 #works
sysctl -w kern.sysv.shmmax=24000000 #also works
sysctl -w kern.sysv.shmmax=1024000000 #doesn't work

What I do know for a fact is that after putting a sleep in /etc/rc after
the sysctl's I was able to verify that my setting from /etc/sysctl.conf
was being applied, but that it was then being over-ridden by the setting
in /etc/rc. Unfortunately, since I only have one mac and it's my primary
computer and testing this requires a number of reboots I'm not keen on
spending more time experimenting with it, but if someone has ideas on a
more elegant fix I'm all ears.

I provided apple feedback about this, btw. Hopefully they'll fix it at
some point.

On Sat, Apr 30, 2005 at 07:00:57AM -0700, Theodore Petrosky wrote:
> Jim,
>
> I didn't understand your comment
>
> "It appears that you can shrink shmmax but not expand
> it."
>
> I did not comment out the kern.sysv.shmmax line and
> it appears that my larger setting is sticking. Or is
> it? What is that command to return the currrnt values
> from the terminal?
>
> Ted
>
> --- "Jim C. Nasby" <decibel(at)decibel(dot)org> wrote:
> > That's interesting. On my powerbook, I had to
> > comment out the sysctl -w
> > kern.sysv.shmmax line in /etc/rc. It appears that
> > you can shrink shmmax
> > but not expand it. This meant that it would properly
> > set it based on
> > /etc/syscttl.conf, but that (large) setting would
> > then be over-written
> > by the subsiquent sysctl -w.
> >
> > On Fri, Apr 29, 2005 at 09:39:55AM -0700, Theodore
> > Petrosky wrote:
> > > I just updated to 10.3.9 and of course the /etc/rc
> > was
> > > dinged. I opened the /etc/rc and found a change..
> > >
> > > # System tuning
> > > sysctl -w kern.maxvnodes=$(echo $(sysctl -n
> > > hw.physmem) '33554432 / 512 * 1024 +p'|dc)
> > > if [ -f /etc/sysctl-macosxserver.conf ]; then
> > > awk '{ if (!index($1, "#") && index($1,
> > "="))
> > > print $1 }' < /etc/sysctl-macosxserver.conf |
> > while
> > > read
> > > do
> > > sysctl -w ${REPLY}
> > > done
> > > fi
> > >
> > > if [ -f /etc/sysctl.conf ]; then
> > > awk '{ if (!index($1, "#") && index($1,
> > "="))
> > > print $1 }' < /etc/sysctl.conf | while read
> > > do
> > > sysctl -w ${REPLY}
> > > done
> > > fi
> > >
> > > sysctl -w kern.sysv.shmmax=4194304
> > > sysctl -w kern.sysv.shmmin=1
> > > sysctl -w kern.sysv.shmmni=32
> > > sysctl -w kern.sysv.shmseg=8
> > > sysctl -w kern.sysv.shmall=1024
> > >
> > > It appears that apple is checking for
> > etc/sysctl.conf
> > > before setting the sysctl values. so I created a
> > > etc/sysctl.conf with this inside:
> > >
> > > kern.sysv.shmmax=33554432
> > > kern.sysv.shmmin=1
> > > kern.sysv.shmmni=32
> > > kern.sysv.shmseg=8
> > > kern.sysv.shmall=65536
> > >
> > > I did not alter /etc/rc. postgresql starts up just
> > > fine. I hope this implys that the issue is
> > resolved..
> > >
> > > Ted
> > >
> > > __________________________________________________
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> > >
> >
> > --
> > Jim C. Nasby, Database Consultant
> > decibel(at)decibel(dot)org
> > Give your computer some brain candy!
> > www.distributed.net Team #1828
> >
> > Windows: "Where do you want to go today?"
> > Linux: "Where do you want to go tomorrow?"
> > FreeBSD: "Are you guys coming, or what?"
> >
>
> __________________________________________________
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>

--
Jim C. Nasby, Database Consultant decibel(at)decibel(dot)org
Give your computer some brain candy! www.distributed.net Team #1828

Windows: "Where do you want to go today?"
Linux: "Where do you want to go tomorrow?"
FreeBSD: "Are you guys coming, or what?"