Webui ram usage vs free


Well-Known Member
Dec 5, 2017

I'm trying to understand how does the webui report the ram usage for the host.

As you can see here the ram usage reported by the webui is 50GB
Screen Shot 2018-09-07 at 1.58.22 PM.png

but according to free shouldn't that value be "total - available column" (125-45=85GB used)
Screen Shot 2018-09-07 at 1.58.28 PM.png

I'm not sure which one to believe. Could ZFS influence the readings ? ARC ?

Any ideas ?

sure ZFS has its own memory what is not shown by free.
The GUI see the memory what is used by the process (KVM VM).
If you have ballooning enabled and it is running in the VM you get the memory without caches,
but the ZFS inside the VM is no cache.
Sorry Wolfgang maybe my original post wasn't clear enough. This is the ram usage for the host (node) not a KVM/CT. The issue I'm having is I'm trying to monitor the ram usage with Nagios but I don't know if I should look up the ram reported by the webui or free ?


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