In versions of Security Analytics 7.0 and later, swap (virtual memory) should be disabled as it may contribute to performance issues. On new installs of 7.x, swap is disabled by default. For upgrades from version 6.x to 7.x, swap may not be disabled as it should by the upgrade process.
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
$ sed -e '/^.*swap.*$/ s/^#*/#/' -i /etc/fstab
$ grep swap /etc/fstab
$ swapoff -a