[SOLVED] after dns changed sometimes site_url takes old value

Hi,
I've worked on a server, the site has been published on the same server, I just changed DNS setting of my hosting and, in the config.inc.php file, I changed the $http_host parameter (all the other values are the same).

I cleaned my cache and everything went ok,
but, after some minutes the site (Wayfinder most of all) took the old url as reference...
so instead of:

www.mysite.com/index.php?id=10

I have http://testingsite.mysite.com/index.php?id=10

exactly, if I look at the source of the page: http://testingsite.mysite.com:80/index.php?id=10

If I clean the cache everything goes fine again, but after some minutes the same problem appears again...
Is there another place where I can set the site_url?...
Is it a hosting setting?
thanks in advance
[ed. note: tillilab last edited this post 12 years, 6 months ago.]

While DNS changes propagate across the net various clients might still be requesting the site via the the testing hostname, which I assume is on the same IP address and most likely being handled by the same virtual host configuration on your server.

You can set the site_url tag non-cacheable in your templates to prevent this in most cases:

Thanks for your answer,

I did it, and actually it works for files reference (css, js etc.)

But how can I manage to make also wayfinder takes the correct path?
I tried calling it uncacheable, but it didnt't work...

Make sure you have disabled cacheResults on Wayfinder first of all.

solved my problem,
thanks!