[I] bthread_concurrency 是否支持减少 concurrency？ (brpc)

["wqshr12345 (via GitHub)" <gi...@apache.org>]

wqshr12345 opened a new issue, #3126:
URL: https://github.com/apache/brpc/issues/3126

   **Is your feature request related to a problem?**
   N/A
   
   **Describe the solution you'd like**
   希望 bthread_concurrency 可以支持减少 concurrency
   
   **Describe alternatives you've considered**
   我们使用 Bthread 实现了协程池，同时我们使用 Bthread Tag Group 来实现不同协程池之间底层 Worker 的分组。现在我们期望不同协程池的 Worker 数量可以动态调节，以灵活适应不同的场景。
   但是我们翻阅代码发现，bthread_concurrency 和 bthread_concurrency_by_tag 两个均不支持减少 concurrency。
   请问这里不支持减少 concurrency 是否存在什么考量？以及是否有好的建议帮助我们实现这样的功能呢？感谢！
   
   **Additional context/screenshots**
   N/A
   


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Re: [I] bthread_concurrency 支持减少 concurrency (brpc)

["yanglimingcn (via GitHub)" <gi...@apache.org>]

yanglimingcn commented on issue #3126:
URL: https://github.com/apache/brpc/issues/3126#issuecomment-3455415542

   一般是性能跟不上了，去增加线程数量。减少线程的需求不是很多。而且内部实现，减少会把已有的很多已经初始化的worker相关东西都要析构掉，这块实现上比较复杂。


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