You have a Compute Engine application deployed in Google Cloud Platform (GCP) that you want to autoscale when total memory usage exceeds 80%. As part of the configuration, you have installed the Cloud Monitoring agent on the instances and set up an autoscaling policy with the following details:

• Metric identifier: agent.googleapis.com/memory/percent_used
• Filter: metric.label.state = 'used'
• Target utilization level: 80
• Target type: GAUGE

However, during periods of high load, you notice that the application does not scale as expected. What should you do to ensure the application scales properly?