Re: PHP CLI & Forking children

qwertycat@xxxxxxxxxxxxxx wrote:
On Sep 29, 3:49 pm, Andy Hassall <a...@xxxxxxxxxxx> wrote:
So you're spawning 500 processes? Do you have a very large number of CPUs to
run them on? Otherwise only a few will actually be running at any time, and
you'll be losing useful throughput to overhead, surely.


Maybe the example I gave was bad :) How about PHP script with launches
4 children, with each child forking another 5 children (20 processes)

Would this development headaches or possible extra bugs?


Just wondering - why do you need to fork processes, anyway? There's a lot of overhead in doing it, and if they're all CPU bound anyway you aren't going to gain anything (unless you have a potload of CPU's).

Forking is good if you have different processes using different resources. But when they have to contend for the same resource, performance often goes down.

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