我有一个PHP代码段,可以读取apache访问日志以进行处理。我已经将代码删除到这几行,我仍然发现泄漏。即使echo memory_get_usage()每次都报告11Mb,PHP进程也会占用越来越多的内存。
在Ubuntu 12计算机上运行PHP 5.3.6。在Ubuntu上使用PHP 5.2就会出问题。
$logDir = opendir(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'tempLog');
while (($file = readdir($logDir)) !== false) {
echo($file . PHP_EOL);
$filePath = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'tempLog' . DIRECTORY_SEPARATOR . $file;
$fhandle = fopen($filePath, 'r');
fseek($fhandle, 0);
while(!feof($fhandle)) {
$line = fgets($fhandle);
}
fclose($fhandle);
echo('Finished reading!' . PHP_EOL);
echo('Memory usage: ' . memory_get_usage() . PHP_EOL . PHP_EOL);
system('cat /proc/' . getmypid() . '/status | grep VmSize');
}
编辑:从此脚本添加了示例输出: EDIT2:添加了VM大小
access.log.2
Finished reading!
Memory usage: 11303616
VmSize: 54972 kB
access.log.19
Finished reading!
Memory usage: 11303616
VmSize: 55896 kB
access.log.23
Finished reading!
Memory usage: 11303616
VmSize: 81372 kB
access.log.41
Finished reading!
Memory usage: 11303616
VmSize: 93120 kB
access.log.31
Finished reading!
Memory usage: 11303616
VmSize: 107508 kB
access.log.28
Finished reading!
Memory usage: 11303616
VmSize: 112128 kB
access.log.5
Finished reading!
Memory usage: 11303616
VmSize: 112920 kB
..
Finished reading!
Memory usage: 11303592
VmSize: 112920 kB
.
Finished reading!
Memory usage: 11303592
VmSize: 112920 kB
任何内存泄漏可能存在的想法?以及如何避免它?
答案 0 :(得分:0)
默认情况下,PHP不进行垃圾收集(似乎是从手册中略过)。你可以做几件事。
1)使用gc_enable()
启用GC。您可以使用gc_collect_cycles()
强制执行GC传递。
2)使用$line
明确销毁unset($line)
。