Hello, Adrian.
The ping frequency is configurable and can be changed, but it's expressed in minutes, so you can change it from default 5 to 1 minute. To do that you will need to go to "C:\Program Files (x86)\UltiDev\Cassini Web Server for ASP.NET 2.0" folder, change the value of the PingKeepRunningEverySoMinutes setting in the UltiDevCassinWebServer2a.exe.config file and restart UltiDev Cassini windows service.
Having said all that, applications don't get unloaded by ASP.NET that quickly and all Cassini does is sends an http request to the application. It doesn't even wait for response, so pinging is not a health check - it' merely a way to keep application loaded in memory to improve first page serve time.
Please let us know if this information was helpful.
All the best,
UltiDev Team.
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