http
Specifies how long to keep a connection open, after completing a response, while there is no matching traffic (in seconds). If an HTTP keepalive is not specified, a default value (610 seconds) will be used. For Global external HTTP(S) load balancer, the minimum allowed value is 5 seconds and the maximum allowed value is 1200 seconds. For Global external HTTP(S) load balancer (classic), this option is not available publicly.