问题
I have installed the monitoring agent in my instance group disk. I need to autoscale instances based on memory usage, however when I am going to configure the target metric in GCE web console I miss the memory usage metric identifier. Which is the missing identifier or how can I autoscale my group based on memory usage?
来源：https://stackoverflow.com/questions/32896048/memory-usage-metric-identifier-google-compute-engine