How does Keep-alive work with ThreadPoolExecutor?

by

Suppose you have a core size of 5, and a maximum size of 15. For some reason your pool gets busy, and uses all 15 available threads. Eventually you run out of work to do – so some of your threads become idle as they finish their final task. So 10 of those threads are allowed to die.

However, to avoid them being killed off too quickly, you can specify the keep-alive time. So if you specified 1 as the keepAliveTime value and TimeUnit.MINUTE as the unit value, each thread would wait one minute after it had finished executing a task to see if there was more work to do. If it still hadn’t been given any more work, it would let itself complete, until there were only 5 threads in the pool – the “core” of the pool.

More Related Contents:

  1. Loop doesn’t see value changed by other thread without a print statement
  2. Difference between wait() and sleep()
  3. SwingUtilities.invokeLater
  4. Handling InterruptedException in Java
  5. How to know if other threads have finished?
  6. ExecutorService that interrupts tasks after a timeout
  7. using sleep() for a single thread
  8. Java thread affinity
  9. How does synchronized work in Java
  10. How to obtain JNI interface pointer (JNIEnv *) for asynchronous calls
  11. SwingWorker in Java [closed]
  12. Pausing/stopping and starting/resuming Java TimerTask continuously?
  13. What are the advantages of using an ExecutorService?
  14. Should I use a separate ScriptEngine and CompiledScript instances per each thread?
  15. Is ExecutorService (specifically ThreadPoolExecutor) thread safe?
  16. Use cases for RxJava schedulers
  17. Impossible to make a cached thread pool with a size limit?
  18. Are Thread.stop and friends ever safe in Java?
  19. Forcing multiple threads to use multiple CPUs when they are available
  20. Background Thread for a Tomcat servlet app [duplicate]
  21. Should you synchronize the run method? Why or why not?
  22. Why does Java not see the updated value from another thread?
  23. Who is calling the Java Thread interrupt() method if I’m not?
  24. Java thread creation overhead
  25. What is adaptive spinning w.r.t lock acquisition?
  26. How can I wrap a method so that I can kill its execution if it exceeds a specified timeout?
  27. How to analyze a java thread dump?
  28. Thread safe Hash Map?
  29. Java multithreading – thread priority
  30. How to listen for Firebase setValue completion

Leave a Comment