This object reports how long the resource that was last evicted from the CIFS AO cache had been held in the cache before it was removed. The MIB itself notes that an administrator should treat an unusually short or long value as a signal to reconsider the cache size, since it indicates the cache is churning through data too quickly or holding stale data too long. For example, an evicted age of only a few minutes would suggest the cache is too small for the current file-access pattern and is discarding data almost as soon as it is cached.