Heavy server load with few users

Hi,
i'm running a flash media server 2.0.4 on linux and a
video/audio-flashchat. When i have about 9 Users, 3 sending, all
others just watching, the network-traffic is acceptable (200kb/s
out, 50kb/s in) but the cpu-load is incredible high. On average fms
uses 20-30% and partitially even 80%. This server has a Dual-Core
AMD Opteron(tm) Processor 1212 with 3gb ram.
Is such a load normal? If i wanted to do a videochat then
with about 100 users i'd then need about 8-10 servers!
Plz tell me how to go on with this or how to cut the load
down to an acceptable one.
Thanks in advance
Azrael

In fact it is probably simpler than this but can be a few things.
If you look at the performance in a quiet system the response time is high. That is because it is only Basis transactions running and they normally have long response times. Many users normally means a better response time up to a point. Especially when you include RFC's into the equation as they perform far better as they have no screen processing
A more likely and common on every system type problem is this. One user runs a transaction that takes 20 seconds and you have 5 users in the same 5 minutes that take 1 second. The average response time will be over 4 seconds. But if it was 100 users with a response of 1 second and 1 user with 20 seconds then the response time would be closer to 1 second. 1 single user running a transaction that takes 2 minutes will really screw up your average response time which is why it is a poor performance measurement.
The standard dialog response time is a far better option. An ABAP runs that writes data to an empty table, updates the table and deletes from the table. It then does some ABAP stuff in memory like square roots. If your servers and DB are performing well then your average response time will be a flat line and any spikes indicate performance problems.
Edited by: Graham Newport on Jun 13, 2008 12:36 AM

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Message was edited by: SilverSkyRat: Additional Question

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