presto-hive/src/main/java/io/prestosql/plugin/hive/s3/PrestoS3FileSystemMetricCollector.java/PrestoS3FileSystemMetricCollector/collectMetrics
class PrestoS3FileSystemMetricCollector:    @Override
    public void collectMetrics(Request<?> request, Response<?> response)
    {
        AWSRequestMetrics metrics = request.getAWSRequestMetrics();

        TimingInfo timingInfo = metrics.getTimingInfo();
        Number requestCounts = timingInfo.getCounter(RequestCount.name());
        Number retryCounts = timingInfo.getCounter(HttpClientRetryCount.name());
        Number throttleExceptions = timingInfo.getCounter(ThrottleException.name());
        TimingInfo requestTime = timingInfo.getSubMeasurement(HttpRequestTime.name());
        TimingInfo clientExecuteTime = timingInfo.getSubMeasurement(ClientExecuteTime.name());

        if (requestCounts != null) {
            stats.updateAwsRequestCount(requestCounts.longValue());
        }

        if (retryCounts != null) {
            stats.updateAwsRetryCount(retryCounts.longValue());
        }

        if (throttleExceptions != null) {
            stats.updateAwsThrottleExceptionsCount(throttleExceptions.longValue());
        }

        if (requestTime != null && requestTime.getTimeTakenMillisIfKnown() != null) {
            stats.addAwsRequestTime(new Duration(requestTime.getTimeTakenMillisIfKnown(), MILLISECONDS));
        }

        if (clientExecuteTime != null && clientExecuteTime.getTimeTakenMillisIfKnown() != null) {
            stats.addAwsClientExecuteTime(new Duration(clientExecuteTime.getTimeTakenMillisIfKnown(), MILLISECONDS));
        }
    }