aws php sdk返回内存数据的空数据点，该数据已从mon脚本perl放入cloudwatch

Question

im using mon-script for retriving Memory From AWS Instances .in aws console every thing is ok but in api datapoint just return empty .it's really confusing because in boto(Python Version) every thing is ok and response correct but in php not

its my code

header("Content-type: text/html; charset=utf-8");
require_once '../sdk.class.php';
$cw = new AmazonCloudWatch(); 
$response = $cw->get_metric_statistics(
'System/Linux', 'MemoryUtilization',
date("c", strtotime('-5 minute')),
date("c", strtotime('now')),
300,
'Average', 
'Percent',
array('Name'=> 'InstanceId', 'Value'=>'i-8c15b124')
);

Answer 1

I don't know anything about PHP but does the date function you are calling return the time in UTC? If it doesn't, that could be problem because the service expects the timestamps to be in UTC.

Answer 2

它通过升级到version3 api来解决。我认为这是一个基于时间戳的问题，与php中的微秒有关