logstash_jruby_memory_OQL

var countByValue = {};
var sizeByValue = {};

// Scroll the strings
heap.forEachObject(
  function(strObject) {
    var key = strObject.metaClass.realClass.cachedName;
      if (key) {
         key = key.toString();
      } else {
         key = "unknown";
      }
    var count = countByValue[key];
    var size = sizeByValue[key] ? sizeByValue[key] : 0;
    countByValue[key] = count ? count + 1 : 1;
    sizeByValue[key] = size + sizeof(strObject);
  },
  "org.jruby.RubyObject",
  false
);

// Transform the map into array
var mapEntries = [];
for (var i = 0, keys = Object.keys(countByValue), total = keys.length; i < total; i++) {
  mapEntries.push({
    count : countByValue[keys[i]],
    string : keys[i],
    shallow_size : sizeByValue[keys[i]]
  });
}

// Sort by counts
//sort(mapEntries, 'rhs.count - lhs.count');

//Sort by size
sort(mapEntries, 'rhs.shallow_size - lhs.shallow_size');