PHP 的内存撑爆了,memory_get_usage()获取的内存为啥还是那么点?

[lysS]

function test($url){
    $pid = pcntl_fork();
    if( 0 == $pid ) {
        $R = file_get_contents($url );
    } 
    elseif( $pid > 0 ){      
        for( $i = 1; $i <= 50; $i++ ){
            sleep( 1 );
            // posix_getppid()函数的作用就是获取当前进程的父进程进程 ID
            var_dump( memory_get_usage() );
        }       
        pcntl_wait($status); //, WNOHANG
        pcntl_waitpid(-1, $status);    //, WNOHANG
                           
    }  else {
        echo "fork error.";
    }
}
$url = 'http://23.252.96.201/100mb.bin';
test($url);

结果:

sh-4.2# php client.php
int(390248)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
int(390280)
PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 98566176 bytes) in /www/forgetword.yixuewenku.cn/client.php on line 223

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 98566176 bytes) in /www/forgetword.yixuewenku.cn/client.php on line 223
int(390280)
int(390280)
int(390280)
^Z
[5]+  Stopped(SIGTSTP)        php client.php
sh-4.2# 

[surfire91]

参数传 true 试试，memory_get_peak_usage() 也试试

[wanguorui123]

内存碎片

[lysS]

@wanguorui123
试了下还是一样的, 有空认真学习下这方面
@surfire91
感谢回复