Use ini_set(“memory_limit”, …) without memory allocation

Question

我如何在PHP中使用ini_set("memory_limit","some_number")只为该php进程设置最大内存限制，而不分配该内存？

Answer 1

I don't think there's a need to prevent allocation of the memory.

Even if the PHP interpreter would start out with a big malloc() (which I doubt) then still the memory is only really allocated as soon as the process starts using it.

A related phenomenon is called overcommitment, there's a few good topics about it here on SO.

Answer 2

something good to read Memory Management with PHP

http://www.informit.com/articles/article.aspx?p=516587

If you explain more about your situation and what you exactly need, then may be more answers you can expect