capped_test.js

randomString = function(string_length) {
  var chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz";
  var randomstring = '';
  for (var i=0; i<string_length; i++) {
    var rnum = Math.floor(Math.random() * chars.length);
    randomstring += chars.substring(rnum,rnum+1);
  }
  return randomstring;
}

cycle = function (x) {
  db.createCollection("capped", {capped:true, size:x, max : 100000});
  for (i = 0; i < (x / 200); i++) {
      db.capped.insert({x:randomString(200)});
  }
  print(new Date);
  printjson(db.capped.stats());
  printjson(db.stats());
  db.capped.drop();
}

cycle(10000000);
cycle(10000000);
cycle(10000000);