Ruud is correct, it's showing Kernel times (ie. when the CPU is performing a kernel mode operation as opposed to a user one!). Basically CPU usage can be spilt into several broad area's - on Win2K there are five - % DPC Time- % Interrupt Time- % Pivileged Time- % Processor Time- % User Time and if you check out Perfmon under the Processor object and click on Explain it will give you a breif text about each option ! Suffice to say, unless you are particularly bothered about each of these leave the 'Show Kernel Mode' box unticked - this will then show you the raw CPU usage data as 'Total CPU Usage' for your system rather than splitting it into Kernel mode etc. !!! Hope that explains things a little !!! Mark eddie.vermeer@xxxxxxxxxx wrote:I know this is OT, but I'm kind of stumped at the moment. I have a server that when I look at the CPU usage through task manager on the small graph, I'm also getting a red line showing at different percentages as it moves along in time with the green CPU Usage line. This is a single CPU server and the CPU is running at a 'normal' level for the server. Everything else seems to be fine. Has anyone see anything like this before or at least know what this red line means ? TIA Eddie Web Site : www.tel-europe.com eBusiness : www.telcustomer.com -Delivering the technology connection- Important Notice: This message is intended for the attention of the person or organisation to which it has been addressed. It may contain information that is confidential, proprietary and/or exempt from disclosure by law. If you have received this message in error please be aware that the sender does not waive any confidentiality, ownership rights or privilege applicable to it. You are therefore strictly prohibited to disseminate, distribute or copy this message in any way. ******************************************************** This Week's Sponsor - Emergent Online EOL's Universal Printer new Features include: Network Printing, Pagestreaming, 2400 DPI. No Client Software Required! http://www.go-eol.com/ ********************************************************** For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm --------------------------------- Yahoo! Plus - For a better Internet experience ******************************************************** This Week's Sponsor - Emergent Online EOL's Universal Printer new Features include: Network Printing, Pagestreaming, 2400 DPI. No Client Software Required! http://www.go-eol.com/ ********************************************************** For Archives, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: http://thethin.net/citrixlist.cfm