dropped packets

A while ago I posted about a hotfix that would correct a problem where virtual machine network connectivity would be dropped under heavy network load (original blog post here). Unfortunately this specific fix was not included in Windows Server 2008 R2 Service Pack 1. We have released a new hotfix to address this problem on systems running Windows Server 2008 R2 Service Pack 1. You can download it from here: http://support.microsoft.com/kb/2263829 Cheers, Ben ... [Lire la suite]

At a customer site we received several notifications of performance issues with a VMware VI3 environment. After having checked the configuration of the VMs and the Hosts we decided to dive into esxtop. At first sight we did not see any abnormalities. Low %RDY, which is usually the first thing I check, some swapping but not enough to cause any major delays. The weird thing about this one is that it seemed that only when IP was sent/received the VM felt sluggish. As we could not reproduce the issue we decided to start esxtop in... [Lire la suite]