Maximilian Tyrtania <mty@xxxxxxxxxxxxxxxx> writes:
> I am trying to increase the amount of shared memory on my Mac OS 10.4
> machine (i have 5 GB RAM installed), but without too much success.
Weird, those same exact settings work fine for me. How up-to-date
is your 10.4.x installation? The relevant part of /etc/rc in mine is
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 kern.sysv.shmmin=1 kern.sysv.shmmni=32 kern.\
sysv.shmseg=8 kern.sysv.shmall=1024
So one obvious gotcha would be if you have a
/etc/sysctl-macosxserver.conf file that sets 'em differently.
The gotchas I know about in this area are:
* The OSX kernel seems to lock down the shmem settings as soon as all
five have been correctly specified via sysctl. This is why the sysctl
done last in /etc/rc doesn't overwrite yours.
* It's fairly draconian about what "correctly specified" is --- notably,
at least some versions insist on shmmax being an exact multiple of the
page size. But the numbers you quoted look OK.
regards, tom lane
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