rdisp/max_debug_lazy_time is a SAP Parameter attribute which is used to control Maximum hold time for work processes in DEBUG mode 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 .
So that work processes are not blocked by debugging for an undefined
amount of time, you can use this parameter to set the maximum amount of
time that a debugging session may be "lazy"; that is, during which no
interaction takes place with the debugger, before the system
automatically resets it. The value 0 means "infinite".
See SAP Parameter Documentation for full SAP documentation for this profile parameter.