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2
votes
1answer
258 views

How can an ESXi have 1 core and 4 sockets?

I know this is in reference to a vCPU, but even so, logically it doesn't make sense to have 4 sockets and a single core. That sounds to me more like you've filled one of the sockets with a single ...
-1
votes
1answer
71 views

vSphere CPU/vCPU Performance [duplicate]

This might be a rookie question but if I'm currently on a 4:1 oversubscription of my CPU ressources does that mean that my processors performances are divided(splitted) into 4 lower perf. vCPU? Will a ...
1
vote
1answer
116 views

KVM: How to update amount of cores/procs during runtime

The title says it all. How do I increase the amount of cores/cpus of a vm without requiring a reboot. Strangely I did not find any documentation of how to do this...
1
vote
0answers
76 views

virsh vcpu_period and vcpu_quota

I have been looking into ways to divide my CPU amongst KVM guests other than by just setting vCPU access limits. I understand the concept of cpu_shares which can be set/displayed with virsh schedinfo, ...
0
votes
1answer
2k views

How does vCPU in VMware vSphere works? [closed]

I would like to know how vCPU works and how its "connected" to the real CPU - how ESXi manages real CPU hardware resources to satisfy vCPU needs? Does vCPU uses all available cores, multithreading, ...
-7
votes
2answers
138 views

Physical server to vCPU`s [closed]

I have the following server: Processor: AMD 12 Cores RAM: 32GB Storage: 2x500GB How many vCPU`s can I create using VMWare ESXi or VirtualBox ? Any other product that you think I should know ? Any ...
0
votes
3answers
62 views

Notification for high vCPU Usage

At the moment I'm using a third party tool (vmturbo) which allows me to monitor the vCPU usage on my VMs. I've been wondering however if there's any method built inside of VMware or through powerCLI ...
0
votes
1answer
717 views

VMware ESXi/vSphere Fault Tolerance vCPU Limit

So I am aware that VMs in FT mode are limited to a single vCPU. Is it possible to assign multiple cores to the single vCPU, and still have the VM support FT mode? Or are you forced to use both a vCPU ...
0
votes
2answers
1k views

VMware - Can a 1 vCPU VM use more than 1 physical core at the same time?

Assume I have a physical ESX host with ONE quad-core processor and hyper-threading disabled. This means it has a total of 4 physical cores or pCPUs. I create a single VM on this VMware host. I assign ...
1
vote
2answers
349 views

Windows Server 2012 Hyper-V bad vCPU performance

we have a windows server 2012 enviroment with two hyper-v servers. Each of them has two 16 Core AMD CPU's, eight 16GB DDR3 ECC RAM modules, 10 HDD's in HW-Raid 6. Now Hyper-V is running and some ...
10
votes
4answers
21k views

Best Practice: vCPUs per physical core

I am trying to find some documentation or best practice guides for virtualization with respect to provisioning vCPUs per physical core (of a CPU). If it matters, I am looking at vmWare for the ...
0
votes
1answer
131 views

how do I add a vcpu to one of my KVMs in QEMU?

I want to add a vcpu to a virtual server in QEMU. I tried editing the XML file in /etc/libvirt/qemu and starting the server, but that does not seem to work.
1
vote
1answer
622 views

Can KVM CPU assignment count differ from physical hosts CPU count?

I have read this question. I knew already that I could for example, have a quad core machine with four guests each having two vCPUs. As they don't all be require 100% CPU usage all the time, the ...
1
vote
2answers
176 views

Optimum amount of vCPUs for IIS7.5 application (ESXi 4.1)

CPU Ready time is really low on my physical server, however ASP.NET(2nd) application is not running fast. VM has 1 vCPU and 12GB of memory where only 6GB is used. Sometimes when team starts working ...
3
votes
1answer
522 views

Modifying the number of VCPUs in a VMware VM

In ESXi, what is the automation/script (I expect it would be using PowerCLI somehow) approach to modify the number of VCPUs in a VM? In context, when using our kickstarts, RHEL won't install the SMP ...
8
votes
1answer
954 views

Are vCPU the same as 1 Socket, or a single Core?

Currently I have a Hyper-v VPS with 2 (vCPU) processor. I would like to install SQL Server Express 2012 that has a limitation of 1 Socket or 4 Cores, whichever the lesser. My Question: Are vCPU's ...
0
votes
1answer
183 views

vCPU and RAM for ESXi Server Scenario

I will be deploying 3 VMs on a 4 CPUs x 2.799 GHz (Intel Xeon W3530), 24GB RAM ESXi 4.1 server. They will be: Win 2k8 R2 with IIS Server, php web gui. Win 2k8 R2 with SQL Server 2008. Win 2k8 R2 ...
1
vote
1answer
432 views

Is there any way that I can control the CPU resources sharing among Xen virtual machines?

I'm going to set up three or two Xen virtual machines on one physical machine. I want those VMs to share different CPU time on average. I've Googled for a long while but still haven't been able to ...
0
votes
2answers
227 views

Citrix XenApp slowness on ESX 4

I need some help with a some CPU constraint issues( i think) diagnosis. I have a client with a Citrix Xenapp farm (5 desktop servers/9 Application servers) spread accross 12 ESX hosts running ESX4.0. ...
2
votes
1answer
7k views

vCPU allocation to a VM on XenServer

I recently upgrade a HP server from one used CPU socket (4 cores + HT = 8 cores) to 2 used CPU sockets (16 cores). However, I'm only able to assign 8 cores to a VM. When setting 16 it defaults back ...
4
votes
3answers
8k views

What does the vSphere 8 core maximum mean?

I'm configuring software that will need about 12 cores to run, but I am running it on a vSphere virtual machine, meaning that at most 8 (virtual) cores can be configured.[1] The physical machine that ...
6
votes
2answers
2k views

Multiple vCPUs or multiple identical VMs, which is better?

I am looking to upgrade one of our servers, an 8 core server running VMware Server 2. The VMs it runs are mostly web, file, and email servers; specifically, it runs three webservers, 2 email/file ...
4
votes
4answers
9k views

Virtualized CPU cores vs. threads

We've got a KVM host system on Ubuntu 9.10 with a newer Quad-core Xeon CPU with hyperthreading. As detailed on Intel's product page, the processor has 4 cores but 8 threads. /proc/cpuinfo and htop ...
0
votes
2answers
442 views

Disable CPUs on boot but allow hotplug in Xen

I would like to create a Xen VM with 32 possible VCPUs but have the guest OS only enable 2 of them on boot. Are there some kernel parameters I can pass in to enable this? I've played around with ...
1
vote
5answers
1k views

Zenworks 10 high cpu usage from dbsrv10

Specifically the process called dbsrv10 is always pegged at 100% or more CPU usage. I've tried clearing the queue-flush using these commands: zman queue-flush F zman queue-flush S However this only ...
0
votes
1answer
295 views

Is there a way to give a xen vm with windows more than one virtual cpu?

I have a quad core machine which is running debian with a xen kernel. I am running a couple linux servers on there which don't do a lot of CPU intesive stuff, but I have there a windows server 2008 ...