Question

Situation:

I am writing a program in C that maintains a number of threads. Once a thread ends, a new one is created.

Each thread forks – the child runs a PHP process via exec() and the parent waits for it to finish.

Each PHP process takes the next item from a queue, processes it and exits.

Problem:

The PHP processes are Symfony tasks and Symfony requires a fairly huge amount of memory. How can I safely calculate the required stack space for each thread so that PHP processes will have enough memory?

The memory limit set in php.ini is 128Mb so should I allocate this much space in the stack?

Answer 1

When you fork you get a new process, when you exec the process is replaced by the one you execute. So any setting of stack space in the C program are irrelevant with regards to PHP memory usage.