28.7. JVM Tuning Techniques

Try these first

1. 1.

   What does the -Xms flag do in JVM tuning?

   Hint

   Think about how you would define the heap size when starting an application.

2. 2.

   Explain the purpose of garbage collection.

   Hint

   Consider what happens when an object goes out of scope.

3. 3.

   What does the -Xmx option control?

   • The maximum heap size
   • The initial heap size
   • The Survivor space size

   Hint

   Remember what happens when your application runs out of memory!

4. 4.

   The G1 garbage collector is suitable for which type of application workload?

   • True
   • False

   Hint

   Think about when predictable performance is critical.

5. 5.

   You are running a large-scale application that experiences frequent garbage collection pauses. Propose a step-by-step tuning strategy to reduce these pauses.

   Hint

   Start by examining logs and then adjust tuning parameters accordingly.

6. 6.

   A web application is facing slow load times due to JIT compilation delays. What are some adjustments you could make to improve JIT performance?

   Hint

   Think about how frequently executed methods can be prioritized.