We use InfoVista 5View NetFlow to understand how network traffic is balanced in operations for load management and diagnostics with PHP coded applications. We implement InfoVista 5View NetFlow on our customer sites so that we can start from the core service of hosting SaaS applications for our business. 

In our use case, the network traffic implements a different load manager from the cloud-hosted applications, so that they stay in balance more. InfoVista 5View NetFlow allows us to control the application layer and manage API connections, i.e.  Facebook logins or whatever other third-party API services we require.