Does the JVM limit the number of threads an Executor can run?

Question

I know I can use a fixedThreadPool to limit the amount of threads my program uses at one time. If I use a cachedThreadPool and could run 10,000 threads, will the JVM schedule them appropriately so not too many are running at the same time?

Answer 1

JVM is tied to OS limitations. OS is tied to Virtual memory, swap space and stack size limitations.

Three stackoverflow threads below should explain:

• Java/JVM limit: Is there any hard limit to a number of threads in Java?
• Linux limits: Maximum number of threads per process in Linux?
• Windows: What's the maximum number of threads in Windows Server 2003?