How to configure a Custom AutoScalar ?

[shiromani_soni1]

How to configure a Custom AutoScalar based on the database value ?

I have gone through the previous posts and standard SAP document for Custom AutoScalar but it doesn't give much information.
I am referring to this link:
https://community.sap.com/t5/technology-blogs-by-sap/scale-your-applications-using-custom-metrics-fe...

By choosing the AutoScalar name other than these five standards is only making it Custom but how to configure APIs to it ???

Metric	Type	Technical Metric Name
Memory Used	standard	memoryused
Memory Utilization	standard	memoryutil
CPU Utilization	standard	cpu
Throughput	standard	throughput
Response Time	standard	responsetime
Custom Metrics	user-defined	arbitrary

How to configure the scaling rules based on the APIs ?
as these look standard to me and it is not adding any value to the Custom AutoScalar.

      "scaling_rules": [
            {
                "metric_type": "tooManyRequestCustomMetrics",
                "breach_duration_secs": 60,
                "threshold": 200,
                "operator": ">",
                "cool_down_secs": 60,
                "adjustment": "+1"
            },

 I really need more information as I want to configure this based on the database value via some API (node.js service)