Paging Implementation Issues

Resident Set Size

• Resident Set Size defined how much of a process is in main memory
• How much main memory do we give to a process i,e what should its resident set size be.

Replacement Scope

• What is the set of potential replacements to choose from
• If the assigned memory to every process is small, the probability of the processor finding another ready process in main memory increases.
• If number of pages of a process in main memory are less, then probability of page fault for that process will increase.
• Adding memory to a process is not always useful, after a certain point we need good page replacement algorithms and better
• Could use fixed allocation determined at initial load time.
• Variable allocation wins long term, as it balances the load by allocating more frames to the processes that are faulting more often.

Credits

• Referred to Notes by Professor Daniel Katz. (previously professor of Operating Systems at NYU Tandon School of Engineering)