Proxmox Hypervisor, vCPU, RAM... etc

[techlists at phpcoderusa.com]

Ok, so basically a vCPU is a thread?






On 2022-10-07 17:49, Bob Elzer via PLUG-discuss wrote:
> I believe it is 1 core has 2 threads. So cores x 2 = thread
> So (2 x 2) x 1 = 4 vCpus
> 
> On Fri, Oct 7, 2022, 4:35 PM Keith Smith via PLUG-discuss
> <plug-discuss at lists.phxlinux.org> wrote:
> 
>> Hi,
>> 
>> I just watched a video that covered the Proxmox Hypervisor.  Seems
>> simple enough.  I've used Oracle's VirtualBox for years.
>> 
>> So I did some research on what a vCPU is.  I was suppressed.  The
>> math
>> given was (Threads x Cores) x Physical CPU = Number vCPU.
>> 
>> I have an old laptop that has 1 socket, 2 cores, four threads, and
>> 4GB
>> of RAM.
>> 
>> Given the math (4 x 2) x 1 = 8 vCPUS.  Is this correct?
>> 
>> From my reading it appears that RAM is not shared, so my bottleneck
>> is
>> RAM not cores or threads.
>> 
>> I am a PHP developer and a local vps would need 2GB of RAM at a
>> minimum.
>> I have found a LAMP VPS will crash if allocated less than 2GB of
>> RAM,
>> and will run will on 1 vCPU.
>> 
>> The good news is I really only need one VPS to be active at any
>> given
>> time.
>> 
>> If I wanted to build a box that could run more than one VPS at a
>> time,
>> lets say 4, and I wanted to allocate 2 vCPUs and 4GB of RAM I would
>> need
>> 4 threads x 2 cores to run the 4 VPS configured with 2 vCPUs each.
>> 
>> What about RAM.  Looks like I would need a minimum of 16GB of ram.
>> 
>> How much resources does the Hypervisor need, in this case Proxmox?
>> 
>> Thanks!!
>> Keith
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