Passivation and Activation
Because resources for the container are finite, it might become necessary for the container to temporarily remove enterprise bean objects to a secondary storage so that the resources the enterprise bean were using can be reclaimed and used for something else. This process of removing EJBs from the container is known as passivation and when the server brings the EJB back into memory from secondary storage, this is known as activation.
Passivation and activation can happen as part of the container’s normal resource management policy. The container doesn’t have to be out of resources for passivation to occur for a bean. In fact, to prevent ever getting close to being out of resources, the container can initiate this action ...
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