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CPU cores and sockets sizing for Windows Server 2016 MCS VDA





We have 6 ESXi 6.0  hosts with 2 sockets and 14 cores per socket  each and 512 RAM. There are 36 MCS provisioned VDAs Win2016 (XD 7.15 CU4.), 6-7 VMs on each host.


Each VDA has:

- 4 vCPU and 1 core per socket configuration,

- 40GB RAM


Earlier we had in average 5-7 users on each VDA and everything was OK. After much more users came, so it's 9-11 on each VDA we faced to high CPU usage.


The question is -  What is most optimal configuration for CPU and it's core and sockets for environment we have? Should performance be better if I change cores count, for instance for 4 vCPU I set 4 cores per socket or 2 cores per  2 sockets? I know about possible license issues. 


This environment was created to serve 360 users but in reality if there are 280-300 active sessions there is already high CPU usage, especially users who working with Chrome (eats sometimes above 50% CPU by 1 user)


Thank you for any advise!


Regards, Olga


P.S Sorry didn't notice I choose wrong forum. Republished the question in https://discussions.citrix.com/topic/405403-cpu-cores-and-sockets-sizing-for-windows-server-2016-mcs-vda/ 

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