How many vCPUs do I need for small vCenter Appliance 5.5

Hi, I'm looking to install VMware vCenter appliance on a host.  It's a small setup with 3 Hosts that would be controlled by vCenter and only a few Vms.

THe default is for the appliance to have 2 vCPUs,  Will it be much affected if I change it to one?
jmsjmsAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, performance will be poor, but change it and test, and see how you find the response to the vSphere Web Client.

The appliance is quite a heavy appliance, as it also has an inbuilt database.
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jmsjmsAuthor Commented:
So poor performance even with that number of hosts?

To test, can I just power off, change vCPU count and reboot?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, you can test that way, and see if it's acceptable,

Hosts generate alot of data which is stored in the database, and the VMs do as well.
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