Avaya Aura® MS is capable of sustained processing of up to 225 session requests per second on the high-capacity CS3 server (approximately 800,000 BHCC). The benchmark sets up a MSML audio session via SIP, plays an announcement for two seconds, and then releases the session (a total of 8 SIP transactions). Lower performance servers will have lower BHCC ratings. All the specified Avaya Aura® MS servers including the virtual appliance should support at least 80,000 BHCC.

It is important to understand that very short hold times may result in the inability to utilize all available session capacity on the server. For example, an Avaya Aura® MS with a capacity of 4000 concurrent sessions running the benchmark above, would require processing of 2000 session requests per second to utilize all available capacity. That would be 7.2 million BHCC, an unrealistic number for a server performing media processing and many other complex functions, and also unrealistic for most application servers. By comparison Aura Session Manager 6.3 is capable of 540,000 BHCC at 150 session requests per second. However, in any case a higher BHCC capacity is unnecessary. The high concurrent session capacity of Avaya Aura® MS is important for call types that have longer hold times. Contact center and conferencing scenarios will quickly consume capacity at lower session request rates because the hold time is longer. A 2 minute hold time in a contact center environment only requires processing of 33 session requests per second (approximately 119,000 BHCC) to fully utilize a 4000 session Avaya Aura® MS.