Agent need to trigger when Shipment Ship Units are removed

Hi All,

Need suggestions on the below requirement.

I need to perform couple of SQL updates and Store Procedure when the Shipment Ship Unit is removed on the Shipment which is been done through assigning of one of the order release on the shipment , I configure an agent on SHIPMENT with Event as SHIPMENT – MODIFIED able to achieve the requirement but its creating a performance issue, as the SHIPMENT – MODIFIED will be frequently raised.

Can anyone suggest me some different approach other than agent type on Shipment and event Shipment - Modified.

Regards,
Tej