JVM中的最大线程数？ [英] Maximum number of threads in a JVM?

问题描述

Java虚拟机可以维护的最大线程数是多少？

What are the maximum number of threads which can be maintained by the Java virtual machine?

我没有在原始问题中解释这一点，但我正在尝试对JVM进行基准测试，并希望尝试查看它可以同时维护多少个线程。

I did not explain this in my original question, but I am trying to benchmark the JVM and would like to try and see how many threads it can concurrently maintain.

在循环中创建线程直到抛出异常是一个选项，但是，我想知道是否有更好的方法来执行此操作。

Creating threads in a loop until an exception is thrown is an option, however, I would like to know if there is a better way to do this.

推荐答案

编写一个创建新线程的循环，直到它爆炸为止是确定的最终方法。你可能会看到性能在它实际死亡之前就会严重降低。

Writing a loop that creates new threads until it blows up is the definitive way to find out. You might well see performance degrade terribly before it actually dies.

我不知道JVM中是否有任何配置参数或其他内置限制我的头。我从未在实践中遇到过极限。当然，迟早你会耗尽内存，也许是其他资源。

I don't know if there's any configuration parameter or other built-in limit in the JVM off the top of my head. I've never run into a limit in practice. Of course sooner or later you will run out of memory, maybe some other resource.

我怀疑线程数本​​身没有限制，而是与线程关联的资源。也就是说，你可能会看到你可以拥有10,000个线程，如果它们只运行一个只带有几个字节数据的小类，但当它们各自拥有1000万个字符串的数组时，它会快速下降。

I suspect that there is not a limit on number of threads per se, but rather on resources associated with a thread. That is, you might see that you can have 10,000 threads if all of them are running just one small class with a few bytes of data each, but the number drops rapidly when they each have an array of 10 million strings.

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