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curl_exec执行时间为啥总是5秒

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Jun 13, 2016 pm 01:26 PM

curldnsexecfileshosts

curl_exec执行时间为什么总是5秒
我使用curl访问另一个网站的网址，其实这另一个网站是同一个服务器和IP，只是域名不同。而且都是unxix的，
采用同步执行curl_exec，中共耗时不多不少，刚好5秒。用此函数访问另外网站则正常、
我很纳闷。为什么刚好5秒呢？而且这绝不是服务器速度和网速，那边的程序就一条语句 echo "OK" ;
我在浏览器直接调用其网址也是不需要时间的。
请求解答。谢谢

------解决方案--------------------
说明5秒的那个域名解析DNS太慢了。
------解决方案--------------------
一是，你的代码
二是，你的目的站
三，你的本地电脑，
先把二，三，换成其他试试。粘出你的代码。
------解决方案--------------------
大约看明白什么意思了
root 打开 /etc/nsswitch.conf

里面大概有一行是
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4

注释掉(在前面添加一个#)
然后在下面增加一行
hosts: files dns

保存.
然后试吧，祝你好运...

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