This check determines whether the web applications have a large number of managed paths configured.
Managed paths are there for a number of reasons. First, they define what the URL of a SharePoint resource will look like. By properly defining managed paths, you can create URLs which will be more easily remembered by the users. For example, poorly defined managed paths will result in such URLs as these:
However, by using and configuring managed paths properly, you could define links which will look like this:
Exceeding 20 managed paths per web application adds more load to the web server for each request. If you plan to exceed twenty managed paths in a given web application, we recommend that you test for acceptable system performance.
This is a general guidance. Exceeding 20 managed paths per web application adds more load to the web server for each request. If you plan to exceed twenty managed paths in a given web application, we recommend that you test for acceptable system performance.
Additional information can be found in the following article: