There was a close range hat-trick from Jonson Clarke-Harris, two goals for man-of-the-match Sammie Szmodics and milestone goals for substitutes Mo Eisa and Idris Kanu.
Joe Ward was involved in four of the first five goals as Posh turned the heat on League One leaders Hull City.
Ratings key: 10-Brilliant, 9-Outstanding, 8-Very Good, 7-Good, 6-Okay, 5-Poor, 4-Dreadful
1.
CHRISTY PYM: A morale-boosting clean sheet for the Posh goalkeeper. One fine save from a first-half free kick, but otherwise a very quiet afternoon 7.
2.
NATHAN THOMPSON: Had to concentrate to keep an eye on players hanging out right on the wing, but he was usually in control. Passed the ball accurately, although lost possession a couple of times. Substituted early once the game was won 7.
3.
DAN BUTLER: Started as a left-back and was very solid defensively and kept his passing simple and safe 7.
4.
FRANKIE KENT: A commanding defensive effort against two lightweight forwards. Made a couple of strong late tackles to ensure the clean sheet was maintained 7.