In memcache mode, when I insert (set) an item in the cache and there is an exisitng item, does the replace of the existing item count as an eviction?
What about in membase mode?
No, it counts as a 'set'. The only thing that counts as an eviction is an actual eviction which is when an item is removed from the cache due to space restrictions.
Membase does not have any concept of "evictions" though we do have "ejections" which are when an item's value is no longer in RAM and only on disk.
Hope that helps.
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