Where is pthread threads max

You only try to join a nonexistent thread the one that the loop tried to create, but failed , but you need to join all of them to make sure they're all done their job.

Instead of using a sleep, use a condition variable. As your code stands now, some threads may have enough time to wake up from the sleep and exit. A semaphore is often used as a definitive mechanism for answering how many elements of a resource are in use -- e.

It is set on a per CPU basis. Asked 4 Months ago Answers: 5 Viewed 63 times. Further recommended fixes: Instead of using a sleep, use a condition variable. Truth is you can represent a semaphore by an INT that is synchronized by a mutex. And the sutuation is repeated again, as root user I can create around 32k threads, as non-privileged user mongod or ec2-user around From the getrlimit 2 man page:. EAGAIN Insufficient resources to create another thread, or a system-imposed limit on the number of threads was encountered.

Increase that limit for your user, and it should be able to create more threads, until it reaches other resource limits. Or plain resource exhaustion - for 1Mb stack and 20k threads, you'll need a lot of RAM. See also NPTL caps maximum threads at ? Side point: you should use -pthread instead of -lpthread. See gcc - significance of -pthread flag when compiling. We ran into this issue when connection issues from the mongo client java get interrupted it seems by the AWS network.

The mongo production checklist suggests keepalives of a much lower time 5 minutes ; setting that should help you avoid the connection limit as well. Sign up to join this community. The best answers are voted up and rise to the top.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Linux max threads count Ask Question. Asked 9 years, 2 months ago. In general, this value is 8M.

You can write a simple code to verify how many can be created. The size of 3G, which is M, is divided by M by 8M to get , but in fact the code segment and data segment also occupy some space.

This value should be rounded down to , and then subtracted from the main thread to get So why is there one less thread on linuxthreads? This is quite right, because linuxthreads also needs a management thread.

In order to break through the memory limit, there are two methods. The above results were tested on CentOS release 5. Tech Community Register Log in. Linux maximum number of threads and maximum number of processes. FaceBook Share. First, the main difference between the 2.