Could not help myself from commenting about those SAP benchmarks even though that might be a boring discussion right now.
Kebabbert, you claim that HP must have done everything that they can to prove that their hardware was the fastest and that this benchmark thus proves that Linux is not as scalable as Solaris 10.
Well there is a problem with that theory and that is that you do not really know if this is what HP was after.
I did some quick "configure your server" on both sun.com and hp.com with the hardware used on each test and the price difference is more than 100%
The HP costs $57254 while the Sunfire costs $125000, so it might not be that far fetched to assume that HP and Sun are targeting different markets with these benchmarks.
Not only is the amount of RAM different (and yes this matters of course since it affects caching), they also use different DBs (and yes this matters since the SAP software has to talk with the DB otherwise it wouldn't be used in the benchmark now would it, and if the DB in one case is answering slower than the other there would most definitely be a difference in CPU utilization on the main server since it would be stuck waiting for answers, aka I/O bound).
Also they have chosen to run with a different amount of benchmark users, 10000 on Sunfire and 8022 on HP.
Considering that the Sunfire is more than twice the price of the DL785 there may be something with the hardware that makes is scale better even though it has lower GHz.
All that we can tell from these benchmarks is that SAP with Oracle 10 runs better on the Sunfire than SAP with MaxDB on a DL785, and that your performance need will determine wheter the double costs is worth it or not.