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Oracle APEX Best Practices by Learco Brizzi, Iloon Ellen-Wolff, Alex Nuijten

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Choosing a web server

When using a web-based development and runtime environment, we have to use a web server.

Choosing a web server

Architecture of APEX

The choice of a web server and the underlying architecture of the system has a direct impact on performance and scalability. Oracle provides us with three choices:

  • Oracle HTTP Server (OHS)
  • Embedded PL/SQL Gateway (EPG)
  • APEX Listener

Simply put, the web server maps the URL in a web browser to a procedure in the database. Everything the procedure prints with sys.htp package, is sent to the browser of the user. This is the concept used by tools such as WebDB and APEX.

OHS

The OHS is the oldest of the three. It's based on the ...

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