Thursday, March 22, 2012

Unable to set size of tmpfs in /etc/fstab RHEL6.2

Resized tmpfs space in /etc/fstab to 4g
tmpfs /dev/shm tmpfs size=4096m 0 0

After reboot, size still on 2G
[root@OEL1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_oel1-lv_root
16G 3.8G 11G 27% /
tmpfs 2.0G 0 2.0G 0% /dev/shm
/dev/sda1 485M 51M 409M 12% /boot


Looks like a bug on RHEL6
https://www.redhat.com/archives/rhelv6-list/2011-February/msg00081.html


[root@OEL1 ~]# mount -o remount /dev/shm
[root@OEL1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_oel1-lv_root
16G 3.8G 11G 27% /
tmpfs 4.0G 0 4.0G 0% /dev/shm
/dev/sda1 485M 51M 409M 12% /boot
[root@OEL1 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.2 (Santiago)