I was listening to some VMworld talks during the weekend and something caught my attention which I hadn’t realized before. The talk I was listening to was VSP2122″VMware vMotion in vSphere 5.0, Architecture and Performance”. Now this probably doesn’t apply to most of the people reading this so let me set the scenario first: Different hosts from a CPU/Memory perspective [...]

On the internal mailinglist there was a discussion today around how disabling TPS (Transparent Page Sharing) could negativitely impact performance. It is something I hadn’t thought about yet but when you do think about it it actually does make sense and is definitely something to keep in mind. Most new servers have some sort of NUMA architecture today. As hopefully [...]

During a VMware healthcheck at one of my customers I ran across the following error in /var/log/vmkwarning: “Memory is incorrectly balanced between the NUMA nodes of this system which will lead to poor performance. See /proc/vmware/NUMA/hardware for details on your current memory configuration.”