what does Open slot with no current process mean in server

apache slotTake a trip back in time to experience life in the Apache Way in this new on slot from Red Ter. With 5 reels and 3 rows, Apache Way boasts 25 always on pays. Match symbolsFrom this mailing list archive, we can give the following definitions : A child is a process or a thread that handles requests. A slot is a placeholder for a child. There may or may not be a