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Posted by Jerry Stuckle on 09/29/07 18:51
qwertycat@googlemail.com wrote:
> On Sep 29, 3:49 pm, Andy Hassall <a...@andyh.co.uk> 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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Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attglobal.net
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