当Apache工作者启动自己的工作线程或进程时会发生什么？

If I'm using Apache with a pool of worker processes, and one of those launches its own long-running process, what happens to that worker? Will Apache kill it eventually, killing the child process? Will that worker be permanently unavailable, but keep running? How does it differ if it starts a thread instead of a process? How does it differ in various web app deployment scenarios?If I'm using Apache with a pool of worker proce