I would like to clarify something, the PerformancePoint service in SharePoint is not related measure SharePoint Performance or its server availability.
PerformancePoint Services in SharePoint Server is a performance
management service that you can use to monitor and analyze your
business. By providing flexible, easy-to-use tools for building
dashboards, scorecards, and key performance indicators (KPIs),
PerformancePoint Services can help individuals across an organization
make informed business decisions that align with companywide
objectives and strategy. Read more at PerformancePoint Services in SharePoint Server overview
So it's just a SharePoint BI tool to visualize and show the data in SharePoint and as I earlier mentioned it doesn't help to build a graph for server availability without the existence of such data sources that hold info about server availability.
In case, you are data source is available and you just looking for a BI tool inside SharePoint. so you have to use PerformancePoint service. Check Using PerformancePoint Dashboard designer in SharePoint. However, you may find some difficulties and limitations in this tool, So it's recommended if you have a license to use Power BI Report Server or SSRS 2016. check more about this at