Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

VMware CPU Question

Posted on 2014-09-17
6
399 Views
Last Modified: 2014-09-30
When I assign 1 vcpu to a VM – how much cpu does this consume on a 2ghz machine?

My server is CPU Cores 12 x 1.999mhz  - what does this mean?
0
Comment
Question by:Kay
6 Comments
 
LVL 19

Expert Comment

by:Miguel Angel Perez Muñoz
ID: 40327933
You server has 12 cores at 2GHz, you can put 12 virtual CPU´s at 2GHz and uses 100% and your server can do the job. This causes your physical CPU uses goes to 100%.
If you uses 1 vcpu at 2GHz, you reserve about 1/12 of your CPU power, you can not get more than this power but can use less. Since is not usual goes to 100% CPU usage, you can get more than your 12 vcpus because your virtual cpus no even uses physical cpu.
0
 
LVL 93

Expert Comment

by:John Hurst
ID: 40327934
The answer to your first question is that the virtual machine will consume as much CPU as it needs (just like a real machine). Most machines run at idle much of the time, and so if the machine has been set up properly, it should use very little CPU unless you hand it a big task.

I am not sure about your second question because I do not know your machine. How many cores does Task Manager show you in the performance Tab.
0
 

Author Comment

by:Kay
ID: 40328012
how do i put 1 vcpu at 2ghz, i didn't know there was an option to specify that ?
0
Use Case: Protecting a Hybrid Cloud Infrastructure

Microsoft Azure is rapidly becoming the norm in dynamic IT environments. This document describes the challenges that organizations face when protecting data in a hybrid cloud IT environment and presents a use case to demonstrate how Acronis Backup protects all data.

 
LVL 93

Expert Comment

by:John Hurst
ID: 40328018
If your virtual machine is modern, then the CPU is probably managed by adaptive power management and will do its own thing. You (probably) do not want it running a full speed to do ordinary things.
0
 
LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40328135
When you add a socket (vCPU), the VM will detect and use a core on the host processor, up to 2000Mhz or 2000 clock cycles. This is the maximum it can use.

It depends on the Virtual Machine and processes running how much of the 2000 clock cycles it will use.

You host server has 12 Processors all clocked at 2000 clock cycles.
0
 
LVL 62

Expert Comment

by:gheist
ID: 40328265
Idle machines consume under 1Mhz on modern CPUs, a bit more when user startes at RDP session...
0

Featured Post

Optimizing Cloud Backup for Low Bandwidth

With cloud storage prices going down a growing number of SMBs start to use it for backup storage. Unfortunately, business data volume rarely fits the average Internet speed. This article provides an overview of main Internet speed challenges and reveals backup best practices.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If we need to check who deleted a Virtual Machine from our vCenter. Looking this task in logs can be painful and spend lot of time, so the best way to check this is in the vCenter DB. Just connect to vCenter DB(default DB should be VCDB and using…
When rebooting a vCenters 6.0 and try to connect using vSphere Client we get this issue "Invalid URL: The hostname could not parsed." When we get this error we need to do some changes in the vCenter advanced settings to fix the issue.
Teach the user how to configure vSphere clusters to support the VMware FT feature Open vSphere Web Client: Verify vSphere HA is enabled: Verify netowrking for vMotion and FT Logging is in place or create it: Turn On FT for a virtual machine: Verify …
Advanced tutorial on how to run the esxtop command to capture a batch file in csv format in order to export the file and use it for performance analysis. He demonstrates how to download the file using a vSphere web client (or vSphere client) and exp…

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question