Ram:CPU ratio poll...

ditlev

Hey Guys - looking across your virtualised serverfarm (those of you that virtualise dedicated boxes). How would you say your RAM:CPU ratio is?

As in, how many gigs of ram do you have per physical core on average?

D

ditlev

so, I probably did not make it clear above... the dedicated servers you are virtualising with Proxmox, OnApp, Solus, Virtualizor, VMware etc etc - how many gigs of ram does those dedicated boxes (hypervisors) have per physical CPU core?

SO, I am not asking about how many gigs of ram in your virtual machine

debaser

It totally depends on what you want to do with the VM of course.

ditlev

@debaser said:
It totally depends on what you want to do with the VM of course.

hmm - not really?
I am trying to get an idea of how #lowendtalk service providers are allocating RAM VS CPU on the dedicated servers that they virtualise and sell as VM's to their customers. Those customers may have specific use cases for the VMs they buy from said host, and go for more RAM or CPU than average. But the hypervisor itself is what I am interested in here

ewrek

You should probably include lower RAM:CPU rations.

ditlev

@ewrek said:
You should probably include lower RAM:CPU rations.

OK? Interesting, so you estimate that many have less than 4G of ram per physical core in their dedicated hypervisors?

On: https://www.100tb.com/servers/bare-metal-servers/ ratio starts at 16:4 (RAM/CORE)

AC_Fan

For most people using dedis (to sell VMs, for personal use etc.), I think it's going to be something like E3 (8 threads) with 32GB RAM or E5 (12 or 16 threads) with 64GB.

ditlev

@AC_Fan said:
For most people using dedis (to sell VMs, for personal use etc.), I think it's going to be something like E3 (8 threads) with 32GB RAM or E5 (12 or 16 threads) with 64GB.

So,
E3 with 32G would be 32:4, ie 8G per core
and the E5 with 64G would be 64:8, again 8G per core.

WSCallum

Are you including threads or just actual cores? For example an E5 8core 16thread would only be 8 physical cores, not 16.

ditlev

@WSCallum said:
Are you including threads or just actual cores? For example an E5 8core 16thread would only be 8 physical cores, not 16.

only physical cores as per the examples above/below

E3 with 32G would be 32:4, ie 8G per core
and the E5 with 64G would be 64:8, again 8G per core.

Harambe

Of the servers I own, it's 8GB per core. 4c/8t E3s = 32GB. 16c/32t Dual E5s = 128GB.

For VMs I rent it's 128MB to 4GB per vCore. VMs on my own machines usually have access to 2 vCores minimum.

ewrek

@ditlev said:

@ewrek said:
You should probably include lower RAM:CPU rations.

OK? Interesting, so you estimate that many have less than 4G of ram per physical core in their dedicated hypervisors?

On: https://www.100tb.com/servers/bare-metal-servers/ ratio starts at 16:4 (RAM/CORE)

With the AMD Ryzen server CPU's a lot of servers will have less.

ditlev

With the AMD Ryzen server CPU's a lot of servers will have less.

Good point actually

FHR

Generally you will see 128GB+ RAM with dual E5 servers, it doesn't make financial sense to go with less RAM. Some do 384GB, few do 768GB (but that's not really common).

ditlev

@FHR said:
Generally you will see 128GB+ RAM with dual E5 servers, it doesn't make financial sense to go with less RAM. Some do 384GB, few do 768GB (but that's not really common).

So thats 128:8 = 16G per physical core, or if 384:8 = 48G per core.
At OnApp we do see a lot of +384G servers, but most of them would be dual Intel silver or golds, so 24 or 40 cores.

Termsie

This really does depend on use case, but I personally wouldn't use more than 4-6GB of ram per core.

ditlev

interesting results on the poll - though, I suspect most votes were based on single VM's and not the actual hypervisor...

codedivine

For some data points from well known providers, i think BuyVM @Francisco used 8gb/physical core and Nexusbytes @seriesn uses 12gb/physical core.

seriesn

@codedivine said:
For some data points from well known providers, i think BuyVM @Francisco used 8gb/physical core and Nexusbytes @seriesn uses 12gb/physical core.

It is usually 1 thread: 4GB Ram, so 1 physical core : 8GB Ram. That is also kinda how our fair share policy is setup :P

codedivine

@seriesn said:

@codedivine said:
For some data points from well known providers, i think BuyVM @Francisco used 8gb/physical core and Nexusbytes @seriesn uses 12gb/physical core.

It is usually 1 thread: 4GB Ram, so 1 physical core : 8GB Ram. That is also kinda how our fair share policy is setup :P

Thanks. I got the 6GB figure because that is the ratio in your vdedicated pools but thanks for confirming.

seriesn

@codedivine said:

@seriesn said:

@codedivine said:
For some data points from well known providers, i think BuyVM @Francisco used 8gb/physical core and Nexusbytes @seriesn uses 12gb/physical core.

It is usually 1 thread: 4GB Ram, so 1 physical core : 8GB Ram. That is also kinda how our fair share policy is setup :P

Thanks. I got the 6GB figure because that is the ratio in your vdedicated pools but thanks for confirming.

Ah! Those 2GB are basically bonus to keep the pricing healthy. . Thanks for the checking in tho boss