don't start a new scheduled search if current one is not finished

hi flyingmouse

according to the excellent docs @ splunk this could be done in savedsearchs.conf with with option realtime_schedule

realtime_schedule = [0|1]
* Controls the way the scheduler computes the next execution time of a scheduled search.
* If this value is set to 1, the scheduler bases its determination of the next scheduled search 
  execution time on the current time. 
* If this value is set to 0, the scheduler bases its determination of the next scheduled search 
  on the last search execution time. This is called continuous scheduling.
*    If set to 1, the scheduler might skip some execution periods to make sure that the scheduler 
     is executing the searches running over the most recent time range.  
*    If set to 0, the scheduler never skips scheduled execution periods. However, the execution 
     of the saved search might fall behind depending on the scheduler's load. Use continuous 
     scheduling whenever you enable the summary index option.
* The scheduler tries to execute searches that have realtime_schedule set to 1 before it
  executes searches that have continuous scheduling (realtime_schedule = 0).
* Defaults to 1

hope this helps, cheers

MuS