On Fri, 2007-11-02 at 09:01 +1100, Lux Zhang wrote: > Hi, > > I experienced a slow web page openning. When I try to open a web page > eg http://home.aapt.com.au, It starts 'looking up home.aapt.com.au, > this lasts more than 40 seconds then to start 'transfer from > home.aapt.com.au. VERY SLOW. > However, if I got the ip adddress of this, eg > http://203.63.89.59 > the 'looking up' lasts less than 2 seconds and start trasfer ... > > I guess it may relate to the ISP dns, apart from the ISP side, what > else I can improve this? Not much. You should isolate DNS from possible load balancer issues at the remote site. Do several "host home.aapt.com.au" or "dig home.aapt.com.au" commands to see how long the DNS service really takes to do the resolution. If the DNS resolution is slow, then I'd file a complaint with your ISP. If the resolution is relatively speedy, then there's two additional possibilities: bad routing from your ISP to aapt or aapt is using some form of load balancing mechanism that's overburdened or not working well. Test the routing with several runs of traceroute. If you see routes that take too long, then I'd tell your ISP to check it. If the traceroutes look OK, then aapt's load balancer may be having issues. In that case, file a report with aapt since the problem's at their end. ---------------------------------------------------------------------- - Rick Stevens, Principal Engineer rstevens@xxxxxxxxxxxx - - CDN Systems, Internap, Inc. http://www.internap.com - - - - Consciousness: that annoying time between naps. - ----------------------------------------------------------------------
