Current memory pressure

[frankive]

I have just installed Veeam One for the first time for a review. I see a lot of Current memory pressure errors.. I guess this is due to dynamic memory..?
What do you do with this "error"?

[Vitaliy S.]

Yes, this is due to dynamic memory. Can you please tell me what is the triggered value for these alarms? What is your memory pressure for Hyper-V VMs?

[frankive]

The triggered value is 80% for warning.
I have never thought of what the VM really want. I have just set f.ex 512-2048 MB Ram for an sql-express server hosting a small database with 3-4 users.
I guess it is better to set the server to static 2048MB?

[Vitaliy S.]

I would advise to adjust the thresholds to 110-120% for warning and 140-150% for error. I will ask our dev team to make it our default values in the next update.

Also I would not recommend using static memory for all your VMs, dynamic memory is a good way to effectively manage your available resources.

[frankive]

I need som explanation for how much the 80% is of? I though 80% was of the maximum defined of the dynamic memory?
Or am I wrong?

You have seen other customers with the same "errors" with a lot of alarms on the memory pressue with dynamic memory?

[Vitaliy S.]

Hi Frank,

Not exactly, memory pressure represents how much memory your VM want compared to allocated value. As long as this number stays under 100, you have enough available memory to service all virtual machines.

Here is a blog post from Microsoft for more info about memory pressure > http://blogs.technet.com/b/chrisavis/ar ... emory.aspx

Memory pressure can only occur when using dynamic memory, so it is expected to see these alerts triggered.

Let me know if that helps!

[KennethLarsen]

Is it still recommended to set hyper-v VM memory preassure to 100%+ ?

and what will that do to static memory alerts ?

[Vitaliy S.]

Yes, that's correct. Static memory will be just "reserved" from all available on the host.

[Justin]

Why have the default settings not been changed in Veeam One if it is Veeam's official policy to recommend changing them? I'm experiencing the same issue, it seems to make plenty of sense to have the thresholds be at 100% or greater, but why is One configured 'incorrectly' out of the box?

[Shestakov]

Yes, it`s officially recommended to raise the thresholds. Most likely historically the threshold was 80% because of Microsoft recommendation back in a days.
Thanks!

[geordi]

Hi folks

I am playing around with Veeam One and on some virtual machines I got errors regarding Current Memory pressure (e.g. 117%).
The description of the alarm is mentioning dynamic memory ... Funny thing is, all virtual machines are configured with static memory, just double-checked.

So why do I get these alarms?

[Dima P.]

Hello Michael,

Kindly review this thread and let us know if you still have any questions. Thank in advance.

[Shestakov]

Hi Michael,
I'm curious what is the version of your hypervisor?
Thanks

[geordi]

@Dima
Found that thread before, but fact is that we do not use dynamic memory. All VMs are set to static.

@Shestakov
2016

[Shestakov]

Starting from HV2016 static VMs also provide memory usage.
It means that VM applications need more memory than VM actually has and that we need to change the alarm description.
Thanks!

[geordi]

Sounds plausible
So the quick and dirty way of getting rid of these alarms is giving the VMs more RAM

[Shestakov]

Yes, you may even run a special report to find all such VMs.
Or you may exclude triggered VMs from the alarm if you don't want to be bothered by such triggers.
Thanks!