Hello, On 26-03 14:00, Valery Shampal wrote: Yes, we use a dual Athlon CPU for performance measurements. On this HW ser with simple configuration is able to do ~ 5000 CPS. The 5k CPS are stateful, stateless ser could do more. Unfortunately I don't know the products. No, there is no HW manufacturer limitation. HW configuration really depends a lot on the test scenarios. If you are going to have many concurrent transactions, you will need at least 4 kB of memory per transaction. So if you know duration of the transactions you can easily calculate how fast you will run out of memory. If you are going to use user location and will have many users registered simultaneously, you will need some additional memory for user location records (~2kB per record). Our tests showed that usually memory is the bottleneck. The more memory you have the longer your tests can run. That's a machine we use for testing. Could you, please, provide us with more information regarding the testing ? We are also interested in such testing (especially if you can generate really high number of CPS or messages per second). Maybe we could provide you with some ser optimizations so both sides could benefit from it. Jan.