[ActiveDir] DNS and CPU Usage

[Santhosh Sivarajan]

Hi all,   I am trying to understand what is happening in the background process on a DNS server after configuring a Delegated Zone.  Here is the DNS and AD (Windows 2000) DC setup   ABC.COM (Top Level Domain) DNS1 & DNS2                       ABC.COM –ADI        XYZ1.ABC.COM-Delegated XYZ2.ABC.COM-Delegated XYZ3.ABC.COM-Delegated 10.X.X.X-ADI   Child Domains XYZ1.ABC.COM                               XYZ2.ABC.COM                   XYZ3.ABC.COM DNS3 & DNS4                                   DNS5 & DNS6                       DNS7 & DNS8 XYZ1.ABC.COM-ADI                       XYZ2.ABC.COM-ADI           XYZ3.ABC.COM-ADI ABC.COM-Secondary                        ABC.COM-Secondary            ABC.COM-Secondary 10.X.X.X-Secondary                           10.X.X.X-Secondary               10.X.X.X-Secondary   Configured 3 Delegated Zones on DNS1 and DNS2 servers.  Everything looks good. Zone.  After one hour I noticed that DNS1&DNS2 servers are not responding to any DNS queries.  Task Manger was showing DNS.EXE is using 500MB of memory and CPU utilization was above 60%.  Has anyone seen this problem before?  Secure Dynamic Update is enabled on both DNS servers.  Any ideas, thoughts or comments?   Any input would be really appreciated   Santhosh