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A generational garbage collector collects the short-lived objects more frequently than the longer lived ones. Short-lived objects are stored in the first generation, generation 0. The longer-lived objects are pushed into the higher generations, 1 or 2.
Most newly allocated objects are allocated in the young generation (see Figure 1), which is typically small and collected frequently. Since most objects in it are expected to die quickly, the number of objects that survive a young generation collection (also referred to as a minor collection) is expected to be low.
A generation 2 garbage collection is also known as a full garbage collection, because it reclaims objects in all generations (that is, all objects in the managed heap).
In long living processes like Windows Services where there is a long idle time. Call GC. Collect() before it goes idle. Reason: If a process is idle, the garbage collector will not kick in, thus unused memory will be not released during idle time.
During the day I see a lot of gen 2 collections in our windows service.
When does GC decide to do full collection instead of collecting only Gen1 and Gen0 or only Gen0?
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