public void setMetricQueueSize(int metricQueueSize) {
        if (metricQueueSize < 1) {
            throw new IllegalArgumentException();
        }
        this.metricQueueSize = metricQueueSize;
    }
Configure the metric queue size, overriding the default. Must be at
least 1.

@see #DEFAULT_METRICS_QSIZE
aws-java-sdk-cloudwatchmetrics/src/main/java/com/amazonaws/metrics/internal/cloudwatch/CloudWatchMetricConfig.java