I've made, while install - separate partition /dev/shm (ext4/LVM) and with size of 24GiB, but after installation df -h show me only 16GB which is half of my installed RAM. Is this a bug or I just need to put size=24g in fstab? I'm using CentOS 7 with latest updates of kernel and everything.
My curent /etc/fstab is
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/dev/mapper/rhel-root / ext4 defaults 1 1
UUID=46875cb8-a194-4a5d-9239-48eac1d6e4a1 /boot ext4 defaults 1 2
/dev/mapper/rhel-dev_shm /dev/shm ext4 defaults 1 2
/dev/mapper/rhel-fra /fra ext4 defaults 1 2
/dev/mapper/rhel-tmp /tmp ext4 defaults 1 2
UUID=8dd99d38-eb70-4ff7-a1b6-dcc69db3ac36 /u01 ext4 defaults 1 2
/dev/mapper/rhel-swap swap swap defaults 0 0
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Filesystem Size Used Avail Use% Mounted on
/dev/mapper/rhel-root 40G 3.1G 35G 9% /
devtmpfs 16G 0 16G 0% /dev
tmpfs 16G 0 32G 0% /dev/shm
tmpfs 16G 8.6M 16G 1% /run
tmpfs 16G 0 16G 0% /sys/fs/cgroup
/dev/sda3 85G 16G 65G 20% /u01
/dev/sda1 477M 122M 326M 28% /boot
/dev/mapper/rhel-tmp 3.9G 26M 3.6G 1% /tmp
/dev/mapper/rhel-fra 30G 618M 28G 3% /fra
tmpfs 3.2G 0 3.2G 0% /run/user/0
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
sda 8:0 0 200G 0 disk
├─sda1 8:1 0 500M 0 part /boot
├─sda2 8:2 0 114G 0 part
│ ├─rhel-root 253:0 0 40G 0 lvm /
│ ├─rhel-swap 253:1 0 16G 0 lvm [SWAP]
│ ├─rhel-dev_shm 253:2 0 24G 0 lvm
│ ├─rhel-tmp 253:3 0 4G 0 lvm /tmp
│ └─rhel-fra 253:4 0 30G 0 lvm /fra
└─sda3 8:3 0 85.5G 0 part /u01
sr0 11:0 1 1024M 0 rom
Kind regards!
Thanks!