Performance

Hyper-V Virtual NUMA Versus Dynamic Memory

January 7, 2014 // 4 Comments

When you are using VMs with a large amount of memory then NUMA topology becomes important. Hyper-V can reveal the underlying physical NUMA topology to the VM so that the guest OS and NUMA-aware apps (such as SQL Server) efficiently assign memory and schedule processes to make the most of the [...]

Memory Page Combining

January 7, 2014 // 0 Comments

My reading of the Windows Server 2012 R2 (WS2012 R2) Performance and Tuning Guide continues and I’ve just read about a feature that I didn’t know about. Memory combining is a feature that was added in Windows 8 and Window Server 2012 (WS2012) to reduce memory consumption. There isn’t too much [...]

WS2012 Hyper-V – Choosing Between Storage Controllers

August 7, 2012 // 0 Comments

The Performance Tuning Guidelines for Windows Server 2012 document is available and I’m reviewing and commenting on notable text in it. There are 3 types of storage controller: IDE SCSI Virtual HBA IDE There are 2 IDE controllers (0 and 1), with each one having 2 channels.  In other words, [...]

WS2012 Hyper-V – Host Memory Sizing

August 6, 2012 // 0 Comments

The Performance Tuning Guidelines for Windows Server 2012 document is available and I’m reviewing and commenting on notable text in it. I have deleted the contents of this post. The information in the Performance and Tuning Guide was incorrect. Technorati Tags: Windows Server [...]

WS2012 Hyper-V – Managing Virtual CPU Performance

August 3, 2012 // 0 Comments

The Performance Tuning Guidelines for Windows Server 2012 document is available and I’m reviewing and commenting on notable text in it. Microsoft makes a very interesting point.  Just because you can allocate virtual CPUs (vCPUs) to a VM (up to 64 if your hardware is up to it), you shouldn’t. [...]

WS2012 Hyper-V – VM & Host Performance Monitoring

August 2, 2012 // 0 Comments

The Performance Tuning Guidelines for Windows Server 2012 document is available and I’m reviewing and commenting on notable text in it. You cannot get true performance monitoring of a VM by running Performance Monitor or Task Manager from within a guest OS.  In fact, you can’t even get true [...]
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