How can I disable AWS ELB and Elastic Cache Metrics from Cloudwatch?

There are lot of metrics getting tracked like HealthyStateRouting, UnHealthyStateRouting etc. We dont require it for test env and it is adding lot more costs too for us.

We are having the daily cost of ~$50 for CW:MetricMonitorUsage (Metrics). How can we reduce it?

As mentioned in the AWS documentation, many AWS services automatically publish a default set of metrics to CloudWatch (known as basic monitoring) with no charge to customers, including ELB and Elasticache.

Have you analyzed CloudWatch cost and usage data with Cost Explorer to check if they are related to custom metrics, detailed monitoring, embedded metrics, alarms o custom dashboards? Those features generate costs.

we got to know that MetricStorage:AWS/Logs-EMF this is adding more cost. how can I check from where it is getting used?

It seems that you are sending embedded metric format logs from your application or a CloudWatch agent. The following AWS documentation page describes how to find those metrics on CloudWatch console.

There are lot of metrics getting tracked like for ELB inside Cloudwatch -> Metrics - HealthyStateRouting, UnHealthyStateRouting etc. We dont require it for test env and it is adding lot more costs too for us.

The ELB metrics you have described fall under the "Basic Monitoring Metrics" listed in the free section of the following document, so there is no charge for them. https://aws.amazon.com/cloudwatch/pricing/?nc1=h_ls

Ok then We are having the daily cost of ~$50 for CW:MetricMonitorUsage (Metrics). How can we reduce it?

If you are using custom metrics as described in the documentation, you will be charged a fee. Make sure you are not using custom metrics.