On NetBSD default thread stack size seems to be around 8 MiB, which is quite a lot and most of the time threads don't need this much space.
When creating large number of threads, process' virtual memory (VSZ) can be quite large. This can be reduced with pthread_attr_setstacksize() but I wonder if there are any advantages to doing this? Solaris used to reserve swap space based on process memory usage, but this doesn't apply to NetBSD. Are there any usage scenarios on NetBSD where the size of virtual memory can be important?
