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跟踪PHP性能问题

[英]Tracking down a PHP performance issue

原文 2014-03-01 10:39:30 9 2 php

I have a PHP script which runs fine on a Raspberry Pi PHP 5.4.4, but when I run the same script on a Cubieboard2 ( about twice the power of the Pi) PHP 5.4.6 I get a long delay. 我有一个可以在Raspberry Pi PHP 5.4.4上正常运行的PHP脚本，但是当我在Cubieboard2（大约是Pi的功能的两倍）上运行相同的脚本时，PHP 5.4.6会出现很长的延迟。 In both cases there is no caching of the PHP as far as I know. 据我所知，在两种情况下都没有缓存PHP。 The problem seems to be with a file_get_contents request which is retrieving some xml from the web. 问题似乎与file_get_contents请求有关，该请求正在从Web检索一些xml。 Although if I enter the same information in a browser in the same system it comes back quickly enough. 尽管如果我在同一系统的浏览器中输入相同的信息，它很快就会返回。

There are no related entries in /var/log/apache2/error.log /var/log/apache2/error.log中没有相关条目

Any ideas of how to track the problem down. 有关如何跟踪问题的任何想法。

Thanks 谢谢

2 个解决方案

Check if both systems have the same settings for ipv6. 检查两个系统的ipv6设置是否相同。 Some distributions have ipv6 enabled and tries that before ipv4. 一些发行版启用了ipv6，并在ipv4之前尝试使用该版本。

Could be a reverse DNS lookup with a invalid resolve setup. 可能是带有无效解析设置的反向DNS查找。 Check if apache(or your webserver) has set reverse dns for logging. 检查apache（或您的Web服务器）是否设置了反向dns进行日志记录。

Check https://serverfault.com/questions/100225/apache-httpd-wont-stop-doing-reverse-dns-requests-for-clients-ips or just google it 检查https://serverfault.com/questions/100225/apache-httpd-wont-stop-doing-reverse-dns-requests-for-clients-ips或只是在Google上搜索

And check if you can ping www.google.at from a shell. 并检查是否可以从Shell ping www.google.at 。