What do you mean by Belady's Anomaly. - Describe with example.

Answer Posted / ajith

Also called FIFO anomaly. Usually, on increasing the number
of frames allocated to a process' virtual memory, the
process execution is faster, because fewer page faults
occur. Sometimes, the reverse happens, i.e., the execution
time increases even when more frames are allocated to the
process. This is Belady's Anomaly. This is true for certain
page reference patterns.

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