LINUX-SWAP-SPACE v19-03-02 Update

Image source: Willi Glenz - Screenshot atop (swap-space)

SWAP SPACE

CHECK

$ free -h
$ top | htop | atop | glances
$ vmstat -w
$ cat /proc/swaps
# fdisk -l
$ cat /proc/sys/vm/swappiness 

TROUBLESHOOTING

01 # swapon -s
02 # ls -lh /tmp 
03 # dd if=/dev/zero of=/tmp/swap_tmp bs=1024 count=1000000
04 # ls -lh /tmp
05 # chmod 600 /tmp/swap_tmp
06 # mkswap /tmp/swap_tmp
07 # swapon /tmp/swap_tmp
08 # swapon -s
09 # echo 100 > /proc/sys/vm/swappiness

PERMANENT

# blkid
# vim /etc/fstab
> # Emergency swap partition
> UUID= (value from blkid)     none     swap     sw    0     0