I have a tmpfs mount defined in my /etc/fstab with a size of 1024m, but when I restart the server it sizes itself to 5.9G. If I run mount -o remount /dev/shm, the size will correct itself to 1G. But it'll revert the next time the server is restarted.
The entry in fstab is:
tmpfs /dev/shm tmpfs size=1024m 0 0
Could there another file that mount could be calling during startup? How might I find that file?
Why do you care? It's not as if that space is being used.
The default size is approximately half your system memory - and yes, there will be somewhere in your startup scripts that mounts a bunch of interesting tmpfs locations on a modern Linux.
You haven't said which particular distribution you use. Various Debian derived distributions might control them via any of:
There's even a /etc/default/tmpfs on squeeze where you can set the default size.
