Re: Blocking Calls and dnsserver avg service

Torsten.Sturm@axis.de writes:

>Hello,
>two questions:
>1. Why does squid report:
>
>"Blocking calls to gethostbyname(): 4"
>
>but on the other side
>
>"dnsservers use histogram:
> dnsserver #1: 160
> dnsserver #2: 11
> dnsserver #3: 0
> dnsserver #4: 0
> dnsserver #5: 0
> dnsserver #6: 0
> dnsserver #7: 0
> dnsserver #8: 0
> dnsserver #9: 0
> dnsserver #10: 0"
>
>2. Is a "dnsserver avg service time" of 2714 msec
>normal for a good internet connection (2 MBit/s) ??
>Should we even run a separate named on the squid machine ?
>
>Background: We are experiencing strong delays for our customers in times
>of heavy load. But where can I find out, if the delay is caused by our
>parent squids, by our squid itself, or by slow hardware ...?

I'd say the 2714 msec average is real, since you've only ever
used 2 out of 10 dnsservers. ie, the DNS requests are not getting
stuck in the queue waiting for an open dnsserver.

You might cut your dnsservers down to three. Then you free up
some more VM for Squid...

Duane W.
Received on Tue Jan 14 1997 - 09:39:29 MST