DATABASE SYSTEM CONCEPTS LCPO
DATABASE SYSTEM CONCEPTS LCPO
7th Edition
ISBN: 9781265586577
Author: SILBERSCHATZ
Publisher: MCG
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Chapter 9, Problem 1PE

Explanation of Solution

Main reasons:

  • The Common Gateway Interface (CGI) usually starts a new process for serving each and every request.
    • Starting a new process every time significantly increases the operating system (OS) overhead.
  • Conversely, servlets are executed as threads of an already existing process.
    • Executing threads from an existing process typically reduces the OS overhead.
  • Additionally, the process executing threads can be the webserver process itself.
    • This avoids the interprocess communication and thereby reducing the expenses.
  • Therefore, for smaller to medium-size tasks, the overhead of Java servlets is lesser than the overhead of using CGI with a C++ or C program.
  • However, for tasks with higher CPU activity, the Java servlets may not provide better performance compared to the C or C++ program with CGI.

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