Does nginx have resolve cache?

[Maxim Dounin]

Hello!

On Thu, Dec 15, 2011 at 05:18:55PM -0500, aficionado wrote:

> I saw the announcement but it looks like  Nginx 1.1.11 isn't still
> honoring the DNS ttl or the "valid" parameter at all.
> 
> I have 2 related questions to this topic 
> 
> 1) Is the following configuration correct to get the resolver
> "resolving" at least every 5 secs? 
> 
> location /mylocation {
> 	    resolver 127.0.0.4 valid=5s;	
> 	    set $myserver "myserver:1000";
>             proxy_pass   http://$myserver;
>             proxy_redirect http://myserver.mydomain.in:8000
> https://www.myserver.com;
>         }

Yes.

> 2)  If I receive 100 request in 50 seconds and have my DNS (127.0.0.4)
> returning records with TTL=1. How many request to my DNS should Nginx
> perform in that period?

With one worker process - about 10 DNS requests, assuming the 
above config.

Maxim Dounin