Mumbai University > COMPS > Sem 5 > Operating System

Marks: 2 M & 5 M

Year: May 2015, Dec 2016 & May 2017

Effect of page size on performance

• The number of frames is equal to the size of memory divided by the page-size. So and increase in page size means a decrease in the number of available frames.
• Having a fewer frames will increase the number of page faults because of the lower freedom in replacement choice.
• Large pages would also waste space by Internal Fragmentation.
• On the other hand, a larger page-size would draw in more memory per fault; so the number of fault may decrease if there is limited contention.
• Larger pages also reduce the number of TLB misses.