>>> Greg Smith <gsm...@gregsmith.com> wrote: 
> have a second count that assumes the last 
> 2*shared_buffers evicted are also still cached.
 
Perhaps it would be better to assume that the external cache is
effective_cache_size - shared_buffers?  Of course, we would need to
have some heuristics to cover odd settings (like effective_cache_size
less than shared_buffers).
 
-Kevin

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