Question

我很想获得整个应用程序使用的内存，以防万一有并行请求或某些cronjob在后面运行。从我发现的PHP文档中：

memory_get_usage ([ bool $real_usage = FALSE ] ) : int

memory_get_peak_usage ([ bool $real_usage = FALSE ] ) : int

我已经通过这种方式测试了这些功能：

我创建了两个php文件，分别包含以下脚本：

//app.php
<?php

$startMemory = memory_get_peak_usage()/1024;
echo "memory before script : ".$startMemory. "bytes <br>";

$array = new SplFixedArray(10000000);
for ($i = 0; $i < 10000000; ++$i) {
    $array[$i] = $i;
}

$endMemory = (memory_get_peak_usage()/1024);
$scriptMemory = $endMemory - $startMemory;

echo  " memory after script : ". $endMemory. ' bytes <br>';
echo  " script memory  : ". $scriptMemory. ' bytes';

第二个：

//app2.php
<?php

$startMemory = memory_get_peak_usage()/1024;
echo "memory before script : ".$startMemory. "bytes <br>";

$array = new SplFixedArray(100000);
for ($i = 0; $i < 100000; ++$i) {
    $array[$i] = $i;
}

$endMemory = (memory_get_peak_usage()/1024);
$scriptMemory = $endMemory - $startMemory;

echo  " memory after script : ". $endMemory. ' bytes <br>';
echo  " script memory  : ". $scriptMemory. ' bytes <br>';

这里的要点是使app.php运行一个可以说一段时间，然后执行app2.php以查看是否 app2.php的$ startMemory大于app.php中的$ startMemory。但不幸的是，不是。

结果：

//app.php
memory before script : 387.9921875bytes 
memory after script : 156640.234375 bytes 
script memory : 156252.2421875 bytes


app2.php
memory before script : 386.4453125bytes 
memory after script : 1950.6328125 bytes 
script memory : 1564.1875 bytes

通常来说，这似乎是通过实际脚本获取已用内存，而不关心其他人使用的内存。

在并行脚本的情况下获取PHP的内存使用情况

0 个答案: