28.6. Performance Monitoring Tools

Try these first

1. 1.

   What does the -Xmx option stand for?

   Hint

   Think about how much memory you want to allocate to your program.

2. 2.

   Which tool is used for graphical monitoring of Java applications?

   Hint

   Consider the tools that provide a user interface.

3. 3.

   What does the -Xms flag do?

   • Sets maximum heap size
   • Sets initial heap size
   • Enables garbage collector

   Hint

   Think about how the JVM starts up.

4. 4.

   True or False: jvisualvm is a command-line tool.

   • True
   • False

   Hint

   Consider the nature of user interface tools versus command-line tools.

5. 5.

   Your Java application has frequent pauses due to garbage collection. Describe how you would use JVM options and diagnostic tools to identify and solve this issue.

   Hint

   Think about both memory allocation and the analysis of performance metrics.

6. 6.

   You need to profile a high-performance application. Explain a step-by-step approach using Java tools to gather performance data.

   Hint

   Consider both the setup phase and the analysis stage.