# The Service Safe Points

+ Suppose a service require the snapshot at a specific timestamp **`T`** being valid
  + It registers a service safe point at timestamp **`T`**

+ The actual `GC Safe Point` cannot exceed the minimal service safe point
+ Service safe points can have `TTLs`

+ Introduced since `v4.0.0`, stable since `v4.0.9`
+ `a.k.a` **`"Self Adaptive GC"`**

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