swap is at 100%

[usa ims]

I just go an alert that swap is at 100%

 Memory              Used       Total  Percentage
green Physical           1827M      15296M         11%
green Actual              554M      15296M          3%
red Swap           15294456M   15294456M        100%

I logged into the box and it is basically idling.

Any help will be greatly appreciated.

usaims