Lots of DNS lookup

Question

Our internal application website that is hosted on a LAMP is very slow to load.

With firebug, we get this : alt text

Most of those files are .js and everything is on the same domain. We can't find why there are so many DNS Lookup, it's insane !

Can you please help us ? Thanks !

Id the graph you posted showing DNS lookups, because I don't see that? — joeqwerty, Dec 03 '10 at 14:51
Is the graph showing a single connection\session to the web site? — joeqwerty, Dec 03 '10 at 15:01
how many js\css files are there and now are they included in the webpages? — Sage, Dec 03 '10 at 15:17
@joeqwerty: yes only one connection @Sage: the php is the first one, everything else is about 6 css and .js files. As far as I know, they are all included. — Bastien974, Dec 03 '10 at 15:33
Well my suggestion at this point would be to run a packet capture on the client and see what all of the DNS lookups are for. — joeqwerty, Dec 03 '10 at 16:12

score 1 · Accepted Answer · answered Dec 06 '10 at 14:11

1

We found that the KeepAlive was at off on the Apache conf, this partially solve our issue because now our website isn't working on Chrome/Safari.

answered Dec 06 '10 at 14:11

Bastien974

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score 0 · Answer 2 · edited Apr 13 '17 at 12:14

0

Check out this answer where someone had a similar issue, turned out it was iptables causing a bottleneck. Turn off any firewalls and see what you get!

edited Apr 13 '17 at 12:14

Community

1

answered Dec 03 '10 at 15:32

Dave Drager

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Thx but I already saw this post and tried, no luck :( – Bastien974 Dec 03 '10 at 15:51

Lots of DNS lookup

2 Answers2