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There is a thread limit for linux and it can be modified runtime by writing desired limit to /proc/sys/kernel/threads-max. The default value is computed from the available system memory.

In addition to that limit, there's also another limit: /proc/sys/vm/max_map_count which limits the maximum mmapped segments and at least recent kernels will mmap memory per thread. It should be safe to increase that limit a lot if you hit it.

The limit you're hitting is lack of virtual memory in 32bit operating system. Install a 64 bit linux if your hardware supports it and you'll be fine. I can easily start 30000 threads with a stack size of 8MB. The system has a single Core 2 Duo + 8 GB of system memory (I'm using 5 GB for other stuff in the same time) and it's running 64 bit Ubuntu with kernel 2.6.32. Note that memory overcommit (/proc/sys/vm/overcommit_memory) must be allowed because otherwise system would need at least 240 GB of committable memory (sum of real memory and swap space).

If you need lots of threads and cannot use 64 bit system your only choice is to minimize the memory usage per thread to conserve virtual memory. Start with requesting as little stack as you can live with.

http://stackoverflow.com/questions/5635362/max-thread-per-process-in-linux

There is a thread limit for linux and it can be modified runtime by writing desired limit to /proc/sys/kernel/threads-max. The default value is computed from the available system memory. In addition to that limit, there's also another limit: /proc/sys/vm/max_map_count which limits the maximum mmapped segments and at least recent kernels will mmap memory per thread. It should be safe to increase that limit a lot if you hit it.

The limit you're hitting is lack of virtual memory in 32bit operating system. Install a 64 bit linux if your hardware supports it and you'll be fine. I can easily start 30000 threads with a stack size of 8MB. The system has a single Core 2 Duo + 8 GB of system memory (I'm using 5 GB for other stuff in the same time) and it's running 64 bit Ubuntu with kernel 2.6.32. Note that memory overcommit (/proc/sys/vm/overcommit_memory) must be allowed because otherwise system would need at least 240 GB of committable memory (sum of real memory and swap space).

If you need lots of threads and cannot use 64 bit system your only choice is to minimize the memory usage per thread to conserve virtual memory. Start with requesting as little stack as you can live with.

http://stackoverflow.com/questions/5635362/max-thread-per-process-in-linux

There is a thread limit for linux and it can be modified runtime by writing desired limit to /proc/sys/kernel/threads-max. The default value is computed from the available system memory. In addition to that limit, there's also another limit: /proc/sys/vm/max_map_count which limits the maximum mmapped segments and at least recent kernels will mmap memory per thread. It should be safe to increase that limit a lot if you hit it.

The limit you're hitting is lack of virtual memory in 32bit operating system. Install a 64 bit linux if your hardware supports it and you'll be fine. I can easily start 30000 threads with a stack size of 8MB. The system has a single Core 2 Duo + 8 GB of system memory (I'm using 5 GB for other stuff in the same time) and it's running 64 bit Ubuntu with kernel 2.6.32. Note that memory overcommit (/proc/sys/vm/overcommit_memory) must be allowed because otherwise system would need at least 240 GB of committable memory (sum of real memory and swap space).

If you need lots of threads and cannot use 64 bit system your only choice is to minimize the memory usage per thread to conserve virtual memory. Start with requesting as little stack as you can live with.

http://stackoverflow.com/questions/5635362/max-thread-per-process-in-linux