Work out load balancer connections per second instantly with clear inputs, formula shown and shareable results.
Load balancers are rated separately for requests per second, connections per second and TLS handshakes per second, and the TLS figure is usually the binding one because an asymmetric key operation is orders of magnitude more expensive than forwarding a request. Keep-alive amortises connection setup across requests, and session resumption removes most full handshakes.
Connection rate
new connections per second = requests per second / requests per connection; TLS handshakes = connections x full-handshake share
Session resumption with tickets, keep-alive to amortise connections, TLS 1.3 which needs one round trip, and ECDSA certificates which are far cheaper than RSA to sign with.
Because it is measured with keep-alive and resumed sessions. Real traffic with many new clients hits the connection and handshake limits long before the request limit.