/proc/sys/kernel/shmmax

[Luca Ferrari]

Hi all,
using a 7.1 server I tried to increment the shmmax value in the proc file, but 
it seems I cannot get more than 600 MB. I tried to fix it to 1GB but the 
system still has 600MB, is it a parameter fixed in the ubuntu kernel? Is 
there a reason for this limitation?

Thanks,
Luca