| Working Set Example |
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| • | Assume
3 page frames |
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| • | Let
interval be w = 5 |
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| • | 1 2 3
2 3 1 2 4 3 4 7 4 3 3 4 1 1 2 2 2 1 |
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| W={1,2,3} W={3,4,7} W={1,2} |
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| – | if w
too small, will not encompass locality |
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| – | if w
too large, will encompass several localities |
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| – | if w
infinity, will encompass entire program |
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| • | if Total
WS > physical memory thrashing |
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| – | Need
to suspend a process (to free up physical memory) |
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