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Men & Mice Support said:
Re: QDNS server, strange responses pagesentry, etc..
From: Mia''s Virtual Post Office
Date: Wednesday, November 15, 2000
Time: 12:54:43 pm
I wanted to revisit this if I may. It looks like this problem of
"deafness" as it were, is still occuring. Since I last emailed we had
rebooted the DNS server and about 2 weeks later the same problem started
again. So far only a reboot will fix it. The server stays running, is
pingable, the QDNS monitor appears to be accepting queries and you can
TB2 to the box. However, if I try to query the server directly it does
not answer.. Also, the pings are showing about a 75% packet loss. I
cannot figure out if this is QDNS or the crummy TCP/IP stack in the MacOS.
I will be taking the server off line today and running through the usual
tests..
>At 12:04 PM -0600 11/1/00, Mia's Virtual Post Office wrote:
>>Ok, we are using PageSentry to monitor our main DNS server and lately,
>>ie., today, we are getting a few random notifications that the server is
>>down when it is *not*.
>>
>>PageSentry is set up to poll the DNS. I took a look at the settings in
>>PS to see if it is possible to boost the timeout for the requests, but it
>>is not. I wonder if our DNS server is just overloaded with requests, and
>>pagesentry is timing out and reporting the server as down when in fact it
>>is up?
>>
>>We are using a WGS 8550/200 80MB RAM, OS 9.0.4, QDNS 2.2.1. (Nothing but
>>QDNS is running on this box) We have given 10MB for RAM to QDNS to run.
>>We have about 3,000 or so zone files. The server is connected to a
>>dedicated port on an umetered switch in our facility, and we have about
>>6Mbps of bandwidth which is only about 25% utilized.. I have narrowed
>>down the ether cable, switch, bandwidth, etc.. My guess is that QDNS or
>>the machine is just not keeping up?
>>
>>Should we give QDNS more RAM? Has anyone seen this before. The box is
>>running and answers direct queries and digs when pagesentry says it is
>>unresponsive.
>
>I can't find any flaw in your reasoning. I do have some questions, though:
>
>3000 domains, but how many queries? In a given space of time (say, 1
>second during peak load hours), how many queries is it getting?
>
>Immediately after launching the server, how much free memory does it show?
>
>Are you using it for recursive resolution as well as serving up your
>own domains?
>
>What's PageSentry's timeout limit? If the docs don't say, try asking Maxum.
>____________________________________________________________________
>Chris Buxton Men & Mice
>cbuxton@menandmice.com We Make DNS Easy!
>
jer
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