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Questions tagged [vcpu]

79 questions
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Azure VM Core vs vCPU

When comparing two different VM series in Azure, I see that one has Cores and the other one vCPUs. Keeping aside the number of Cores/CPUs, Memory and Processor Type (Intel Xeon E/Platinum etc), what is the advantage of one over the other? I…
Thomas
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processor type differences between elasticache instance types , will all instances suffer the same way?

This may sound like yet another, "what is a vcpu" or "should I use elasticache, remember its single threaded!!" question --- but I think this asks a question unanswered. redis is single threaded, means only one core will ever be used. elasticache is…
Muradin007
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Performance on Pinned CPU cores versus automatically managed?

I have a XenServer 7.5 environment where I'm running a single Windows VM with 16 total vCPU's. My server has dual Xeon E5-2620v4 CPU's with 8cores/16threads each clocked at 2.1GHz nominal and a Max Turbo at 3GHz. My question is whether allowing the…
Felix Jen
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Analyze single CPUs activities instead of sum of total CPU for what is usefull for?

I'm building a monitor to track down all Linux /proc data that can be usefull to understand how the server is behaving. Still I cannot understand if I should track every single CPU (and in a virtual environment they can be many) or I can just track…
Max Cuttins
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Best VMWare Esxi CPU Resource Allocation Policy

We have a machine with an 88-core CPU in our department. Imagine there are 11 researchers who want to use the machine whenever they have to test a new approach. We've made 11 VMs on VMWare ESXI host, one for each researcher. The question is how to…
Ali Hashemi
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What does take all the cpu here?

On a small SSD VPS I got 2 GB of RAM and 2 vCPU core (dedicated to my server), virtualized via KVM. So far so good. The server is mainly used for databases (MySQL) and fast network file storage (via sshfs). Currently around 5 folders are mounted to…
Flatron
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Virtualization: vCPU pinning with Hyperthreading Host CPU?

I'm using KVM/libvirt on a Linux server with Core i7-2600 CPU, which has the following CPU topology (1 Socket, 4 Cores, 8 Threads): Physical | Logical ---------+-------- Core 0 | 0, 4 Core 1 | 1, 5 Core 2 | 2, 6 Core 3 | 3, 7 I usually run…
lynix
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Single virtual machine in ESXi with all cores assigned

I have this 2 CPU server (2x4 = 8 cores in total) in which I plan to put a single W2012 virtual machine. Is it a good idea to configure 8 vCPU for the VM or should I leave spare cores to relief virtualization overhead?
LatinSuD
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KVM: How to update amount of cores/procs during runtime

How do I increase the amount of cores/cpus of a vm without requiring a reboot.
Kristofer
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How does vCPU in VMware vSphere works?

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, etc? Where can I find any docs discribing specific…
mirx
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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 VM's are up. But the VM's have a very poor CPU…
h.grewe
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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 settled the CPU for about 20 minutes. I'm running…
kfreise
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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 with the application - it spikes to 100% CPU…
DmitrySemenov
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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 find a way to achieve my goal. I'm wondering is that…
Yuliang
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vcpu counts aren't changing after config change and reboot

I recently downsized the number of vcpus virtual server Echobox1 uses from 4 to 1. before: # virsh vcpucount Echobox1 maximum config 4 maximum live 4 current config 4 current live 4 I…
a coder
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