Comments on: Using Perfmon in a Windows VM http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html A Technologist and Virtualization Expert Thu, 11 Feb 2010 06:48:40 -0700 http://wordpress.org/?v=2.8.4 hourly 1 By: Mike DiPetrillo http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-773 Mike DiPetrillo Fri, 08 Jan 2010 18:08:15 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-773 Sweet. Nice addition, Scott. Sweet. Nice addition, Scott.

]]> By: drummonds http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-772 drummonds Fri, 08 Jan 2010 17:59:01 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-772 Mike, found this old post at the top of a Google search and wanted to update it with a link to an article of mine. Your guidance remains 100% correct on Windows-based counters. But we added new counters in vSphere to Perfmon that are accurate within the guest (because they are actually host counters passed through the guest SDK).<br><br><a href="http://vpivot.com/2009/09/17/using-perfmon-for-accurate-esx-performance-counters/" rel="nofollow">http://vpivot.com/2009/09/17/using-perfmon-for-...</a> Mike, found this old post at the top of a Google search and wanted to update it with a link to an article of mine. Your guidance remains 100% correct on Windows-based counters. But we added new counters in vSphere to Perfmon that are accurate within the guest (because they are actually host counters passed through the guest SDK).

http://vpivot.com/2009/09/17/using-perfmon-for-...

]]> By: Jaap http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-749 Jaap Mon, 26 Oct 2009 09:53:22 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-749 It may be true that the VMware performance monitoring tools are sufficient if you want to monitor the usage of your virtual machines as a whole, but I'd still go for Performance Counters within Windows guests to differentiate between processes using up a lot of time. Same goes for disk monitoring; you still want to know if your Windows VM uses it's swap file correctly, or if it needs increasing for whatever reasons thinkable. It may be true that the VMware performance monitoring tools are sufficient if you want to monitor the usage of your virtual machines as a whole, but I'd still go for Performance Counters within Windows guests to differentiate between processes using up a lot of time. Same goes for disk monitoring; you still want to know if your Windows VM uses it's swap file correctly, or if it needs increasing for whatever reasons thinkable.

]]> By: Dale Sides http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-742 Dale Sides Tue, 22 Sep 2009 01:36:40 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-742 This article is true to an extent. Remember CPU and Memory are not the only measures of performance. I have solved a lot of problems by observing disk and I/O statistics (which can drive up memory and cpu utilization as the app churns waiting for I/O response). Those are still valid within the guest OS and if you are seeing high CPU and MEM this could be caused by the I/O. See the following blog entry and look at the VMware Product Mgr's response in the comments section. <br>"Importantly, other counters when measured inside the guest such as Memory, Disk and Network don’t really suffer from accounting problems (i.e. they are accurate) as compared to CPU utilization numbers captured over a period of time (which may be accounted different due to the scheduling and de-scheduling the hypervisor does). So the numbers for Disk, Memory and Network when captured inside the Windows guest will be the same as the VI client." This article is true to an extent. Remember CPU and Memory are not the only measures of performance. I have solved a lot of problems by observing disk and I/O statistics (which can drive up memory and cpu utilization as the app churns waiting for I/O response). Those are still valid within the guest OS and if you are seeing high CPU and MEM this could be caused by the I/O. See the following blog entry and look at the VMware Product Mgr's response in the comments section.
“Importantly, other counters when measured inside the guest such as Memory, Disk and Network don’t really suffer from accounting problems (i.e. they are accurate) as compared to CPU utilization numbers captured over a period of time (which may be accounted different due to the scheduling and de-scheduling the hypervisor does). So the numbers for Disk, Memory and Network when captured inside the Windows guest will be the same as the VI client.”

]]> By: Mike DiPetrillo http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-716 Mike DiPetrillo Sun, 21 Jun 2009 10:05:12 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-716 Yup. Go vSphere 4.0!! Yup. Go vSphere 4.0!!

]]> By: vmw http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-715 vmw Sat, 20 Jun 2009 21:03:52 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-715 Mike. There's a new feature in vSphere 4.0 that allows you to view "accurate" CPU utilization counters from the hypervisor about a VM using Perfmon (in-guest). Check out <br><a href="http://communities.vmware.com/blogs/drummonds/2009/06/18/using-perfmon-for-accurate-esx-performance-counters" rel="nofollow">http://communities.vmware.com/blogs/drummonds/2...</a> Mike. There's a new feature in vSphere 4.0 that allows you to view “accurate” CPU utilization counters from the hypervisor about a VM using Perfmon (in-guest). Check out
http://communities.vmware.com/blogs/drummonds/2...

]]> By: Welcome to vSphere-land! » Performance Links http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-693 Welcome to vSphere-land! » Performance Links Fri, 08 May 2009 02:49:37 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-693 [...] Performance Scalable Storage Performance Performance Best Practices and Benchmarking Guidelines Using Perfmon in a Windows VM Interpreting esxtop Statistics Understanding and Customizing VMware ESX Server Performance Charts [...] [...] Performance Scalable Storage Performance Performance Best Practices and Benchmarking Guidelines Using Perfmon in a Windows VM Interpreting esxtop Statistics Understanding and Customizing VMware ESX Server Performance Charts [...]

]]> By: Gerald V Robinson http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-543 Gerald V Robinson Mon, 16 Feb 2009 04:10:31 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-543 i luv your blog :), you are on my rss reader now i luv your blog :) , you are on my rss reader now

]]> By: James J Connell http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-485 James J Connell Mon, 02 Feb 2009 05:09:13 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-485 nice article! nice site. you're in my rss feed now ;-)<br>keep it up nice article! nice site. you're in my rss feed now ;-)
keep it up

]]> By: Jorge Avilas http://www.mikedipetrillo.com/mikedvirtualization/2008/12/using-perfmon-in-a-windows-vm.html/comment-page-1#comment-483 Jorge Avilas Sun, 01 Feb 2009 15:58:40 +0000 http://www.mikedipetrillo.com/mikedvirtualization/?p=257#comment-483 nice article! nice site. you're in my rss feed now ;-)<br>keep it up nice article! nice site. you're in my rss feed now ;-)
keep it up

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