One of my colleagues (Thanks Horst) pointed me to this option I had never noticed with ESXTOP “-l”. The option has been added to avoid high CPU utilization as the result of a large amount of LUNs during collection of the storage statistics. kb 1005894 Add a lock mode (-l) to esxtop to help optimize CPU utilization. In a large [...]
Scott Lowe pointed to KB Article 1020524 in his short take article. Although I agree with Scott that it is a useful article it is actually technically incorrect. I wanted to point it out as when Scott points to something you know many will pick up on it. On Nehalem systems with Hardware assisted Memory Management Unit (MMU), TPS improves performance from 10 – 20% by using [...]
We had a discussion internally about performance and swapping. I started writing this article and asked Frank if it made sense. Frank’s reply “just guess what I am writing about at the moment”. As both of us had a different approach we decided to launch both articles at the same time and refer to each others post. So here’s the link to [...]
I had a discussion with someone around limiting a VM to a specific amount of Mhz’s after I found out that limits where set on most VMs. This environment was a “cloud” environment and the limit was set to create an extra level of fairness. My question of course was doesn’t this impact performance? The answer was simple: No as [...]
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 [...]
VMware has just released version 1.1 of the VMware Desktop Reference Architecture Workload Simulator (RAWC). As I know many of my readers are actively working on View projects I thought it might be of interest for you. VMware Desktop Technical Marketing & TS Research Labs are jointly announcing the availability of VMware Desktop Reference Architecture Workload Simulator (RAWC) version 1.1. [...]
On twitter Scott Drummonds just posted that VMware has submitted TPC-H benchmarks. Not only did they submit the benchmark VMware managed set a new world record for price/performance! VMware ranked first with $ 0.70 Query-per-Hour Performance. The question of course is why is this important? It is important because TPC is a recognized industry leading benchmark and results can be used [...]
