Alachisoft NCache 4.1 - Online Documentation

Priority Based Eviction

This is the default eviction policy and has same mechanism as LFU with the addition of a relative cost that is associated with an object at the time of its addition to cache. Objects with lower cost are removed before objects with higher cost. Client application can choose from a list of priorities that is predefined (Low, Below Normal, Normal, Above Normal, High and Not Removable). In case a priority is not chosen, it is set by default as Normal.
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