What is the eviction manager?

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Eviction designs Central to eviction is an EvictionManager - which is only available if eviction or expiration is configured.   The purpose of the EvictionManager is to drive the eviction thread which periodically purges items from the DataContainer.  If the eviction thread is disabled (wakeupInterval set to -1) eviction can be kicked off manually using EvictionManager.processEviction(), for example from another maintenance thread that may run periodically in your application.