Bind9recursion查询具有间歇很长的响应时间

我在Ubuntu 12.04 LTS上运行BIND 9.8.1-P1caching服务器，内核3.2.0-86-generic-pae。

我已经把头撞在墙上试图弄清楚了几个星期，我只是不知道发生了什么，而且很难重现这个问题，因为它是非常间歇的。

现在发生的事情是，当用Firefox的networking监视器打开时，在Firefox中加载www.msn.com这样的网页时，偶尔会看到一些DNSparsing部分时间从8000ms到高达37000msparsing时间的请求。 当然，一旦我重新加载页面，它被caching，然后工作正常，但即使我刷新服务器和客户端上的caching突然，该域不再是一个问题。 我还没有看到任何域名有问题的模式。 我只是不知道如何解决这个问题，因为它很难复制两次相同的域。

以下是我在named.conf.options中的所有内容

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options { directory "/var/cache/bind"; // If there is a firewall between you and nameservers you want // to talk to, you may need to fix the firewall to allow multiple // ports to talk. See http://www.kb.cert.org/vuls/id/800113 // If your ISP provided one or more IP addresses for stable // nameservers, you probably want to use them as forwarders. // Uncomment the following block, and insert the addresses replacing // the all-0's placeholder. forwarders { //OpenDNS 208.67.222.222; 208.67.220.220; }; auth-nxdomain no; # conform to RFC1035 //listen-on-v6 { any; }; }; 

我真的很难确定发生了什么事，更别说如何解决这个问题了，所以我希望有人能帮上忙。

根据要求，这是日志logging生成时，查询日志logging，然后加载www.wsj.com。 只有4个请求缓慢的DNS响应

 tags.bluekai.com 11986ms Jul 30 17:50:14 fs named[23539]: client 192.168.16.24#55215: query: tags.bluekai.com IN A + (192.168.16.3) Jul 30 17:50:15 fs named[23539]: client 192.168.16.24#55215: query: tags.bluekai.com IN A + (192.168.16.3) Jul 30 17:50:16 fs named[23539]: client 192.168.16.24#55215: query: tags.bluekai.com IN A + (192.168.16.3) Jul 30 17:50:18 fs named[23539]: client 192.168.16.24#55215: query: tags.bluekai.com IN A + (192.168.16.3) Jul 30 17:50:22 fs named[23539]: client 192.168.16.24#55215: query: tags.bluekai.com IN A + (192.168.16.3) comcluster.cxense.com 24004ms Jul 30 17:38:32 fs named[23539]: client 192.168.16.24#52469: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:14 fs named[23539]: client 192.168.16.24#56490: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:14 fs named[23539]: client 192.168.16.24#54692: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:15 fs named[23539]: client 192.168.16.24#54692: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:15 fs named[23539]: client 192.168.16.24#56490: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:16 fs named[23539]: client 192.168.16.24#54692: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:16 fs named[23539]: client 192.168.16.24#56490: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:18 fs named[23539]: client 192.168.16.24#54692: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:18 fs named[23539]: client 192.168.16.24#56490: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:22 fs named[23539]: client 192.168.16.24#56490: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:22 fs named[23539]: client 192.168.16.24#54692: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:26 fs named[23539]: client 192.168.16.24#56963: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:27 fs named[23539]: client 192.168.16.24#56963: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:28 fs named[23539]: client 192.168.16.24#56963: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:28 fs named[23539]: client 192.168.16.24#56963: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:30 fs named[23539]: client 192.168.16.24#56963: query: comcluster.cxense.com IN A + (192.168.16.3) Jul 30 17:50:34 fs named[23539]: client 192.168.16.24#56963: query: comcluster.cxense.com IN A + (192.168.16.3) cdn.cxpublic.com 23509ms Jul 30 17:50:26 fs named[23539]: client 192.168.16.24#57469: query: cdn.cxpublic.com IN A + (192.168.16.3) Jul 30 17:50:27 fs named[23539]: client 192.168.16.24#57469: query: cdn.cxpublic.com IN A + (192.168.16.3) Jul 30 17:50:28 fs named[23539]: client 192.168.16.24#57469: query: cdn.cxpublic.com IN A + (192.168.16.3) Jul 30 17:50:30 fs named[23539]: client 192.168.16.24#57469: query: cdn.cxpublic.com IN A + (192.168.16.3) Jul 30 17:50:34 fs named[23539]: client 192.168.16.24#57469: query: cdn.cxpublic.com IN A + (192.168.16.3) www.facebook.com 33666ms Jul 30 17:39:37 fs named[23539]: client 192.168.16.24#54063: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:26 fs named[23539]: client 192.168.16.24#63809: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:26 fs named[23539]: client 192.168.16.24#61280: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:27 fs named[23539]: client 192.168.16.24#63809: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:27 fs named[23539]: client 192.168.16.24#61280: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:28 fs named[23539]: client 192.168.16.24#63809: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:28 fs named[23539]: client 192.168.16.24#61280: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:30 fs named[23539]: client 192.168.16.24#63809: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:30 fs named[23539]: client 192.168.16.24#61280: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:34 fs named[23539]: client 192.168.16.24#63809: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:34 fs named[23539]: client 192.168.16.24#61280: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:38 fs named[23539]: client 192.168.16.24#64685: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:39 fs named[23539]: client 192.168.16.24#64685: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:40 fs named[23539]: client 192.168.16.24#64685: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:42 fs named[23539]: client 192.168.16.24#64685: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:46 fs named[23539]: client 192.168.16.24#64685: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:50 fs named[23539]: client 192.168.16.24#57121: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:51 fs named[23539]: client 192.168.16.24#57121: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:52 fs named[23539]: client 192.168.16.24#57121: query: www.facebook.com IN A + (192.168.16.3) Jul 30 17:50:54 fs named[23539]: client 192.168.16.24#57121: query: www.facebook.com IN A + (192.168.16.3)