I'm running 160+ Oracle virtual servers on 3 IFLs.  None run virtual MP. All 
are UP.  Everyone is happy. I am not saying that this is one size fits all - 
most of the DBs are measured in Gb not Tb, so lotsa medium sized servers. Just 
tremendous horizontal growth.  What are the users doing? All sorts of thing, 
WAS requests, portal requests.  When an Oracle VM does an I/O, the next machine 
in queue gets some cycles, all machines get their work done, everyone is happy 
see above. Lot's of headroom left on the IFLs for Oracle - not like the
CRJ by Bobmbardier where I bang my head at least twice when a passenger - which 
I am frequently. See 747 comments.
Saying virtual MPs works well for database - gee, I dunno, I don't see it. It 
depends I guess on the sort of requests coming to the server, like if some user 
app does a sequential read, or something. Isn't an Oracle DB server there to 
serve up data? Cached or disk data?
Domino? Different story - it has many of its own indexing tasks - let 'em run 
in a separate virtual CPU and in the other virtual CPU read some mail for a 
user or something.
 
David Kreuter

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