Number of Users for a VA
A typical VA deployed with minimum hardware requirements has a tested throughput of at least 2000 queries per second.
Taking into account these metrics, a single VA can handle DNS requests from at least 57,000 concurrent users. Secure Access defines a single user as a client that generates an average of 1000 DNS requests in a typical eight-hour workday. Therefore, Secure Access defines concurrent users as the number of users or devices sending DNS requests to a VA at the same time.
If the VA specifications are increased to two virtual CPUs and 1GB RAM, a single VA will be able to handle DNS requests from at least 115,000 concurrent users. The number of users on the network likely will NOT be the limiting factor when determining the number of VAs to deploy.