A single TCP connection may be kept open for a number of HTTP requests and responses thanks to the HTTP keep alive or HTTP persistent connection instruction. The Keep-Alive general header allows the sender to hint about how the connection may be used to set a timeout and a maximum number of requests.
Keep Alive Option
Keep Alive Connection : It specify the percentage of keep alive connections per virtual user.
Keep Alive Timeout : It specify the keep alive timeout for idle TCP connection.
Keep Alive Connection Settings Option
By default, unlimited requests can be processed on a keep alive connection. Users can also specify the range (minimum and maximum).
Runtime Changeable Yes