do you set your threads to $old_size = threads->set_stack_size(4096);?

Effectively yes. Though I do it in a different way. My advice to you would be to use: 

use threads ('stack_size' => 64 * 1024 );

[download]

Doing it this way means you only need to do it once at the top of your program.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
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In reply to Re^21: Monitor list of threads running by BrowserUk
in thread Monitor list of threads running by mr_p

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