-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Then the next step can be using Docker and Kubernetes. Your application will be running inside the Docker container and Kubernetes will be managing all the resources. So Kubernetes can do already some scaling and allocate more resources to your application when needed. As well you can use Skooner (https://github.com/skooner-k8s/skooner) , a dashboard for Kubernetes. From there you can see if your Kubernetes configuration is optimal or it needs some tweaking (more CPU, more RAM, perhaps bigger disk...).
There are a bunch of load testing tools available that let you throw a bunch of requests at a server and see how it copes, my personal preference is locust.io