How To Calculate Hit Ratio In Page Replacement

Page replacement is a crucial aspect of memory management in operating systems. Calculating the hit ratio helps evaluate the efficiency of a page replacement algorithm. This calculator and guide will walk you through the process.

1. Enter the number of pages and hits.
2. Click ‘Calculate’.
3. View your results and chart below.

The hit ratio (HR) is calculated as:

HR = (Number of Hits / Total Pages) * 100

Hit Ratio Comparison

Algorithm	Hit Ratio
FIFO	75%
LRU	90%

• Understand your workload to choose the right algorithm.
• Regularly monitor and adjust your page replacement strategy.

What is a page fault?

A page fault occurs when a process references a page that is not currently in memory.

For more information, see:

• Operating System Concepts
• UMD CMSc432 Notes