Nick Piggin wrote:
[..]

However I think for Oracle and others that use shared memory like
this, they are probably not doing linear access, so that would be a
net loss. I'm not completely sure (I don't have access to real loads
at the moment), but I would have thought those guys would have looked
into fault ahead if it were a possibility.

i thought those guys used O_DIRECT - in which case, wouldn't the page 
cache not be used?


cheers,

lincoln.
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