Author Archives: Rohit Bajaj

Quick synopsis: Recently while using Microsoft SCCM to upgrade splunk agents on windows severs, ran into issue where appenforce logs were showing upgraded agent is installed but i didn’t see anything installed in control panel. Long story short, something was messed up. Came across this tool from Microsoft to properly cleanup the installed agent beforeContinue reading “A useful tool from Microsoft”

The %cstp value is the time vCPU is stopped from executing while waiting for other vCPU’s in the same virtual machine to execute/catch up. With this definition, cstop is not applicable to VMs with 1 vcpu. Users have this conception that increasing the vcpu will increase the performance of VM. While this is true inContinue reading “What is %cstp or co-stop ?”

We have not enabled this feature though this provides lot of flexibility in upgrading the resources. Simple reason is enabling this feature disables NUMA. That brings the second question why should we care about NUMA ? What is NUMA ? The best explanation about NUMA is i think on this site. https://www.exitthefastlane.com/2016/04/vsphere-design-for-numa-architecture.html In very simpleContinue reading “Should we enable hot add feature ?”

Recently we ran into issue where business quickly demanded name of VMs which were rebooted due to HA. There are few ways to do it. Outlining below 2 methods to do that. First method is via simple powercli script and second method is via VM uptime gathered from vcenter. First method. Every VM rebooted dueContinue reading “How to quickly find VMs rebooted due to VMware HA.”