wdisp/status_poll_interval is a SAP Parameter attribute which is used to control Interval for a hardware load balancer to poll Web Dispatcher status information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
Parameter wdisp/status_poll_interval (default 0 seconds) specifies the
poll internal of a buffered load balancer.
The Web Dispatcher quits the state "Running" as soon as it receives a
soft shutdown request. However, the Web Dispatcher still accepts new
connections for the duration of the configured poll interval in order to
give the Load Balancer time to recognize the change of state.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.