Pushing database updates to Web Pages

Newbie Question..
We are looking to force Web Pages to be updated when the contents of the database have changed.
The overhead of having the Web Page refresh every few seconds would not be acceptable.
Pages could be supported by Cold Fusion, JSP, etc whichever is easiest to integrate with pushing data.
Where do I start my homework / reading ?
What are the best Key Words to use when searching for answers?

This is the article I thought of when seeing your message - a bit old but relevant to your investigation:
http://www.javaworld.com/javaworld/jw-03-2000/jw-03-pushlet_p.html
Depending on what you are after, you might investigate caching - Oracle9iAS Web Cache can be invalidated from calls from a DB. Check out:
http://otn.oracle.com/docs/products/ias/doc_library/90200doc_otn/caching.902/a95404/intro.htm#1656
Mike.

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