How to calculate the stack size for a thread/worker_thread?

Hi,

I'd like to know how to calculate the required stack size for a thread/worker_thread.

Also is there any method to know current memory usage? ( for debug memory leak )

BTW, the comment in http_server.c says /* printf requires 4K of stack */

is this true?

Doe that mean we should avoid using printf/sprintf in a thread/worker thread

if the stak size is less than 4K. (My test shows it seems ok to print someting even

the stack size is just 2K)

Thanks.

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