On Mon, Oct 31, 2011 at 9:51 AM, Anssi Kääriäinen
> Stupid question, but why not keep the whole VM pinned?
It might be that keeping more than one VM page pinned is a good idea,
but we'd have to think carefully about it. For example, if we pin too
many pages in shared_buffers, other queries could start erroring out
for failure to find an evictable buffer.
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