[squid-users] RE : [squid-users] performances ... again

Okay ...
It's been the hardest 20 minutes of the day : find a few domain names that "should" have not been accessed and cached by our DNS.

Well, from Paris, France, time given by dig stats :
- mana.pf (French Polynesia, other side of the Earth, satellite link) : around 700ms
- aroundtheworld.com, astaluego.com, apple.is, dell.nl, Volvo.se : between 100 and 150ms
- nintendo.co.jp, Yamaha.co.jp, pioneer.co.jp : around 300ms

Cached entries are returned in less than 1ms.

Ionel

-----Message d'origine-----
De : Henrik Nordstrom [mailto:henrik_at_henriknordstrom.net]
Envoyé : vendredi 6 juin 2008 21:05
À : GARDAIS Ionel
Cc : Squid Users
Objet : Re: [squid-users] performances ... again

On fre, 2008-06-06 at 14:37 +0200, Ionel GARDAIS wrote:
> I got a user (whom I can trust) who uses an explicit proxy configuration
> : there are no improvments.

Ok. Then it's at the proxy, or the DNS servers it uses.

Remember that to diagnose DNS slowness you need to query for hosts and
domains which has not yet been visited, as the DNS server also caches a
lot. Lookups of already visited domains/hosts is not valid as proof to
say that the DNS is fine..

> I tried to avoid use of calls which cause DNS lookups (hence the
> host.match() and host.indexOf() ).

Good.

Regards
Henrik
Received on Fri Jun 06 2008 - 19:56:04 MDT