Swap memory usage is high in Linux

Hi ,
There is one following alert .
Message : cdm:Average (2 samples) swap memory usage is now 91%, which is above the warning threshold (90%)
is this because of swap memory over usage.
There is one following alert .
Message : cdm:Average (2 samples) swap memory usage is now 91%, which is above the warning threshold (90%)
is this because of swap memory over usage.