To see if swap is currently enabled on a Security Analytics appliance version 7.x, log in via SSH as 'root' and run "free -m":
$ free -m
total used free shared buffers cached
Mem: 7968 7708 260 28 178 6726
-/+ buffers/cache: 802 7166
Swap: 8173 0 8173
In this example, note that swap is turned on (total Swap = 8173) but not used (used = 0, free = 8173).
If swap is on, regardless of the amount used, turn off and disable it using the following procedure:
1) Disable swap on boot/startup by commenting out the "swap" line in /etc/fstab using 'sed':
$ sed -e '/^.*swap.*$/ s/^#*/#/' -i /etc/fstab
Verify that it is commented out (has a # at the beginning of the line):
$ grep swap /etc/fstab
On the next system boot, swap will not be enabled.
2) To clear and turn off the swap immediately without performing a reboot, run:
$ swapoff -a
For a system with high swap usage, this command could take a long time (>30min) to complete and performance may remain degraded during that operation. If needed, cancel that command with Ctrl-C and reboot the appliance to finish clearing and disabling swap more quickly.