I can't really tell, but I can guess.

TOP only shows a bunch of oracle processes, but...

At least one of them is the Oracle Enterprise Manager, with does performance 
and such.
Another one is the log process.  It closes a 10MB log file about every 50 
minutes under idle conditions.  Much more frequent when active.
And Oracle OEM has its own scheduler which pops to see if it needs to do 
anything.

I can run without OEM, and get rid of much of the overhead.  But then when a 
bad query comes along, I have no way of knowing, unless it gets to the point of 
users complaining to the help desk.

With it, I look at the historic charts, see nothing, and do something else.

So right now, I'm back to multiple applications per database (the way god 
intended <G>)

Tom Duerbusch
THD Consulting

Law of Cat Acceleration

  A cat will accelerate at a constant rate, until he gets good and
  ready to stop.


>>> Adam Thornton <[EMAIL PROTECTED]> 4/2/2008 3:56 PM >>>
On Apr 2, 2008, at 3:40 PM, Tom Duerbusch wrote:

> Of course.

Does Oracle itself poll ridiculously often?  Can you tell what
processes are running in the "idle" guests that are sucking down CPU?

Adam

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