Time to Live (TTL) is the length of time you want to have the cache store data after a request for data.
To set the TTL (Time to Live) value for enabled caching, follow these steps.
In the Edit Data Source form, expand Enable Authentication, Caching, Proxy, Insecure Access.
Ensure caching has been enabled and a cache selected.
Enter a value for TTL (Time to Live) in seconds.
Click Preview Data Source (optional).
Click Save Data Source.