node.js - 如何在node.js中获取aws dynamodb ConsumedCapacity？

Question

我看到了 aws 文档，并且插入了参数 ReturnConsumedCapacity 但没有响应 ConsumedCapacity 对象...(使用 dynamodb local)

我犯了什么错误？

var params = {};
params.TableName = this.tableName;
params.Limit = 100;
params.ReturnConsumedCapacity = "TOTAL";
var items = [];
    var scanExecute = function() {
      dynamo.scan(params, function(err, result) {
        console.log(result); // not found ConsumedCapacity...
        if (err) {
          console.log(err);
          callback(new Error('dynamo scan error'));
        } else if (result.Count === 0) {
          callback(null, undefined);
        } else {
          items = items.concat(result.Items);
          if (result.LastEvaluatedKey) {
            params.ExclusiveStartKey = result.LastEvaluatedKey;
            scanExecute();
          } else {
            callback(null, items);
          }
        }
    });
  }
  scanExecute();

Answer 1

当您运行 DynamoDB 本地实例时，不会跟踪消耗的容量。

Consumed capacity units are not tracked. In operation responses, nulls are returned instead of capacity units.