Tim Attwood wrote:
> Memory can be free, but not available, it can
> be fragmented, some other process might
> have put a small amount of data in a big block,
> the block is mostly empty, but is GC later by
> the system after it runs out of fresh memory,
> so after many levels the system packs the
> memory in tighter, and the next GC takes
> longer to be required because the data is
> now assigned to the same blocks instead of
> scattered blocks.
> 

Now that makes sense!

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