Re: Performance problems? 2k dynamic dns issue

From: No-One ()
Date: 10/11/04 

Date: Mon, 11 Oct 2004 11:56:54 -0700

Ace,
Thanks for the Spotlight on windows tip. I've downloaded it and run it
against a few of my servers. The DNS server in question shows only that
threads are waiting for the cpu to take care of them. So we'll be upgrading
the box very shortly. Its a strange result because that machine is not under
heavy use when those alarms get sounded. Frequently only 2% or 3% cpu usage
yet the work queue length can be as much as 20 threads waiting on the cpu.

"Ace Fekay [MVP]"
<PleaseSubstituteMyActualFirstName&LastNameHere@hotmail.com> wrote in
message news:OYNPgIbqEHA.3464@tk2msftngp13.phx.gbl...
> In news:ujn4y7XpEHA.1164@TK2MSFTNGP10.phx.gbl,
> Kevin W. Gagel <gagel@cnc.bc.ca> made a post then I commented below
>> All clients are automatically configured through dhcp which sets them
>> to the primary and secondary dns servers we have internally. These
>> two servers are configured with the primary as the one to forward
>> changes to our ISP's dns servers and our secondary acts as a slave to
>> the primary.
>> So all clients using dhcp will/do have the primary and secondary dns
>> servers configured as their dns servers. None of them have the
>> external (ISP) servers as fall backs.
>>
>> We have only about 1,000 to 1,500 computers with 400 to 800 active at
>> any one time. The majority of these are not doing dns queries at the
>> same time.
>> Simultanious queries could be expected from our labs which operate
>> from 7 to 11 each day for 600 to 700 computers.
>>
>> The monitoring software is showing the dns servers as unavailable
>> throughout the night. At this time there will be a maximum of 1
>> person using the internet (security). Hence, I'm puzzled about why
>> they don't respond with the record on the first query but do with the
>> second query.
>
>
> Are there any errors in the Event logs of the DNS servers, or any servers
> at all?
> Are these machines responding to queries from the Internet or are they
> just used for your internal AD structure?
>
> Try using Quest's Spotlight on Windows. Download the 30 day trial and
> install it on a machine other than the DNS servers and watch the DNS
> server performance thru it. You can log the stuff and find out at what
> time they drop offline and coorelate that to what in your Event logs or
> anything else happening on the network.
>
> --
> Regards,
> Ace
>
> Please direct all replies ONLY to the Microsoft public newsgroups
> so all can benefit.
>
> This posting is provided "AS-IS" with no warranties or guarantees
> and confers no rights.
>
> Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
> Microsoft Windows MVP - Windows Server - Directory Services
>
> Security Is Like An Onion, It Has Layers
> HAM AND EGGS: A day's work for a chicken;
> A lifetime commitment for a pig.
> --
> =================================
>
>

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