>Interesting. THis needs about two bytes per page for the counter?

   Actually, we found that a single byte per page was sufficient. Pages tended
to be either heavily accessed or rarely accessed. Even in the unusual case
where all pages are frequently accessed, the page reclaim rate (and thus
adjustment rate of the page references count) increases high enough to still
provide for a decent distribution of the counters and for the page LOU to be


David Greenman
Co-founder, The FreeBSD Project - http://www.freebsd.org
President, TeraSolutions, Inc. - http://www.terasolutions.com
Pave the road of life with opportunities.

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