I've read a little bit about swap memory, but I don't understand it enough to make a decision on trying to look into this more on my system.
Here's what I have available right now:
user@ubuntu:$ free -m
total used free shared buffers cached
Mem: 15932 11505 4427 104 1315 6719
-/+ buffers/cache: 3470 12462
Swap: 0 0 0
Should I be concerned that I have no swap memory available?