How to increase tmpfs filesystem in Linux ?
Today in this post, we will see how to increase tmpfs filesystem in Linux.
tmpfs as its name suggests is a temporary memory based filesystem and uses the system memory for processing.
The benefit of this Filesystem is that RAM is much faster than hard disk and your temporary data can be processed much faster which you tend to save on any of the temporary filesystem.
Lets see step by step how to increase tmpfs filesystem.
1. Check out current tmpfs size.
[root@ngelinux19 grub]# df -h /dev/shm
Filesystem Size Used Avail Use% Mounted on
tmpfs 126G 24G 103G 19% /dev/shm
[root@ngelinux19 grub]#
[root@ngelinux20 ~]# free -g
total used free shared buffers cached
Mem: 251 66 185 0 1 59
-/+ buffers/cache: 5 246
Swap: 127 0 127
[root@ngelinux20 ~]#
2. Remount the partition with new increased size.
[root@ngelinux19 grub]# mount -o remount,size=170G /dev/shm [root@ngelinux19 grub]# df -h /dev/shm Filesystem Size Used Avail Use% Mounted on tmpfs 170G 24G 147G 15% /dev/shm [root@ngelinux19 grub]#
3. Increase/Mention the size in fstab file to stay persistent after reboot.
[root@ngelinux19 grub]# cat /etc/fstab # # /etc/fstab # Created by anaconda on Tue Nov 26 16:08:09 2019 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=87d80495-1d68-4582-b7f5-0b0527123d13 / ext4 defaults 1 1 UUID=2461cac9-18b0-465a-911f-844ccca76d6d /boot ext3 defaults 1 2 UUID=d6cbb68e-249d-40ad-8f2b-f6a9494c0ba0 /var ext4 defaults 1 2 UUID=e95562e6-a279-4557-993c-17a39eedb13b swap swap defaults 0 0 tmpfs /dev/shm tmpfs defaults,size=170G 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/vg00/lscratch /scratch ext4 defaults 1 2 /dev/vg00/ltmp /tmp ext4 defaults 1 2 [root@ngelinux19 grub]#