On: Go Creeping In

[pcwalton]

Do many Go programs really have 100,000 goroutines simultaneously? I'm certain that's quite rare.

[stickupkid → pcwalton]

Working as part of Juju project, I can tell you for certain that the answer here is yes, very much so.

[pcwalton → stickupkid]

If you have over 100,000 threads, then you are at the point of scalability where you probably want more than what Go can provide. Async I/O would likely be better for your use case, because even 2kB of stack per thread is 195MB just from thread stacks.

[saturn_vk → pcwalton]

Well, even if you do not do any parallel work for each request in your service, each request in itself is a goroutine. So depending on the load of that service, you might reach such numbers, and more.