The thread group setting in JMeter has a leveling set that sets the start time, end time, duration, and startup delay of the script execution under this thread group. This feature is used when you need to perform performance tests in the middle of the night.
PS: To set the scheduler configuration, you need to set the number of previous cycles to always (self-feeling, because this will not be due to the number of cycles not enough to stop the pressure test)
The following describes the configuration of the scheduler:
Startup time: When the test plan is started, the startup delay overwrites it. When the startup time has elapsed, it is also overwritten by the current time when the script is run manually (but the start Time page display does not change).
End time: When the test Plan ends, the duration will overwrite it.
Duration (seconds): How long the test plan lasts, overwriting the end time.
Startup delay (seconds): How long the test plan is delayed to start, overwriting the startup time.
jmeter--Scheduler Configuration