30.26 GiB - Caution: Allocating too much memory can slow the system or prevent VMs from running.

[lifeteo]

Good afternoon.
Previously, 32 GB of RAM was installed, I installed 64 GB, but there are remarks in the virtual machine interface that there is not enough memory.

TrueNAS-SCALE-22.02.2.1

 

[lifeteo]

running virtual machines - 14,5gb

 

[sretalla]

There's another thread somewhere that talks about the system (in SCALE) basically halving the available RAM and assigning that to ARC (I guess that means even if you're not using that much ARC), which renders the available amount for VMs at a quarter of system RAM somehow, since you're chasing your tail with diminishing returns each cycle.

You can, of course just ignore the warning and run the VMs anyway, but you may have trouble handling VMs together with heavy ZFS workloads together due to the ARC setting.

I think I saw it was raised as a bug, so maybe somethig will improve about that in one of the coming releases, but it will be a little while before those.

 

[lifeteo]

It seems to me that it is a problem of display of the message. Earlier, when there was little memory and I started a new virtual machine, before starting, the system explicitly asked me - I definitely want to start, there is not enough memory.
Now the system starts without problems.

In TrueNas, we have Autotune, in TrueNas Scale there is no such as I understand. :(

 

[anodos]

It seems to me that it is a problem of display of the message. Earlier, when there was little memory and I started a new virtual machine, before starting, the system explicitly asked me - I definitely want to start, there is not enough memory.
Now the system starts without problems.

In TrueNas, we have Autotune, in TrueNas Scale there is no such as I understand. :(

VM memory management in SCALE is being reworked somewhat. See here: https://github.com/truenas/middleware/pull/9445