I test single ejabberd(4cpu 8GB Cnetos7) by Tsung, 6000 simultaneous users to login then join MUC room to talk every ten seconds, it shows CPU Load over mean 2.5 CPU % over mean 40%; but when I have two nodes(4cpu 8GB Linux) ejabberd cluster, I test 12000 usrs, two ejabberd nodes shows CPU Load over mean 3.5 CPU % over mean 75%; When I have three nodes ,It shows higher in CPU performance in 12000 usrs test, Who can help me answer, thans.
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