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It is not recommended to cluster session controllers to obtain better performance, usually having two session controllers for failover fail-over purposes is more than enough – testing . Testing has proved that there is little or no gain in performance by having more than one session controller. It is in very few applications that the The CPU usage of the PP server is only in very few installations above 20%, so . So most likely adding additional machines or session controller instances, often only generates more session replication, and doesn’t does not improve overall performance.
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