Schedulers (Cont.)

# Short-term scheduler is invoked very frequently (milliseconds) => (must be fast).

# Long-term scheduler is invoked very infrequently (seconds, minutes) => (may be slow).

# The long-term scheduler controls the degree of multiprogramming.

# Processes can be described as either:

* I/O-bound process – spends more time doing I/O than computations, many short CPU bursts.

* CPU-bound process – spends more time doing computations; few very long CPU bursts.