This page lists some of the Configuring TeamCity Server Startup Properties which can be used to tweak certain aspects of TeamCity behavior.
It is not recommended using any of these unless you face an issue which you expect to address by using the properties.
Please note that the support for any of these properties can be abandoned in the future versions of TeamCity without any notice. Thus, if you find a property useful in your environment please let us know about that: detail your case and the properties/values used in an email sent to our support email address.
Web Page Refresh Interval
You can configure different polling intervals (in seconds) for different pages in the TeamCity web UI:
How often the server is queried for common events (like build statuses, agents counter and so on).
The delay between an event (received via polling or WebSockets) and the ajax request to update the UI.