Re: Maximum number of processes in Linux

[Lee Revell <rlrevell@joe-job.com>]

On Tue, 2006-08-15 at 17:12 -0600, Robert Hancock wrote:
> Irfan Habib wrote:
> > Hi,
> > 
> > What is the maximum number of process which can run simultaneously in
> > linux? I need to create an application which requires 40,000 threads.
> > I was testing with far fewer numbers than that, I was getting
> > exceptions in pthread_create
> 
> What architecture is this? On a 32-bit architecture with a 2MB stack 
> size (which I think is the default) you couldn't possibly create more 
> than 2048 threads just because of stack space requirements. Reducing the 
> stack size would get you more.
> 
> I should also point out that any design that requires 40,000 threads is 
> probably quite flawed unless you are running on a very large machine..
> 

Thread stack size defaults to whatever your distro sets RLIMIT_STACK to.
It's 8MB here.

Lee