the word device he was referring to the shared memory.
the kernel.shmall ~= kernel.shmmax / pagesize
typically, pagesize=4096, and round better top to an integer and divisible by 1024.
on 32битной kernel.shmmax shouldn't do more than 4*10243
and then the operating system will ignore. on 64bit you can, but do not make more than there is RAM.
note the syntax:
sysctl -w kernel.shmmax=33554432
around the sign equal
spaces no. in the file /etc/sysctl.conf — is. so I recommend to edit sysctl.conf
sysctl -w kernel.shmmax=33554432 >>/etc/sysctl.conf
for views of shared memory segments, use comando ipcs
to force uninstall Geispolsheim ipcrm