Working Set
• A working set of a process is used to model the
dynamic locality of its memory usage
– Working set = set of pages a process currently needs
– Denning in late 60’s
• Definition:
– WS(t,w) = set of pages referenced in the interval
between time t-w and time t
• t is time and w is working set window (measured in page refs)
• Page is in working set only if it was referenced in last w
references