CloudWatch で Java のヒープメモリを計測する

 // CloudWatch クライアント作成
    AmazonCloudWatch client = new AmazonCloudWatchClient(new AWSCredentials() {
      @Override
      public String getAWSSecretKey() {
        return awsSecretKey;
      }

      @Override
      public String getAWSAccessKeyId() {
        return awsAccessKey;
      }
    });

    MemoryMXBean mBean = ManagementFactory.getMemoryMXBean();
    MemoryUsage heapUsage = mBean.getHeapMemoryUsage();
    double used = heapUsage.getUsed() / 1024;
    double max = heapUsage.getMax() / 1024;
    double committed = heapUsage.getCommitted() / 1024;

    Dimension dimension =
      new Dimension().withName("InstanceId").withValue("01");
    PutMetricDataRequest request =
      new PutMetricDataRequest().withNamespace("JVM").withMetricData(
        new MetricDatum()
          .withDimensions(dimension)
          .withMetricName("HeapMemoryUsed")
          .withUnit(StandardUnit.Kilobytes.toString())
          .withValue(used),
        new MetricDatum()
          .withDimensions(dimension)
          .withMetricName("HeapMemoryMax")
          .withUnit(StandardUnit.Kilobytes.toString())
          .withValue(max),
        new MetricDatum()
          .withDimensions(dimension)
          .withMetricName("HeapMemoryCommitted")
          .withUnit(StandardUnit.Kilobytes.toString())
          .withValue(committed));

    client.putMetricData(request);