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Thanks for your great support! Awesome how good proxmox support is even for the community subscription. I thought I knew how ARC works and that your new default is way, way too small. Turns out once again that you pro guys know what you are doing and I suffered from the dunning kruger effect.

Cheers mate! Now this looks more interesting: Sep 16 02:31:18 pve smartd[839]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 76 to 77 Sep 16 02:31:18 pve smartd[839]: Device: /dev/sdc [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from...

Haha, oh my gosh sorry, you are right. I just looked at the 16th and just assumed September, this has nothing to do with this shutdown :D Logs from where? Maybe I am not educated enough, but I did not see anything worthwhile in the event viewer.

Do I understand you correctly, that you also don't think it came form the GUI,API because it isn't in the PVE task list? Regarding Windows event viewer, it gets a little bit strange and I am a little bit confused what happened here. Looking output from above, one could assume that qemu-ga.exe...

Normally I would not think much about a VM shutting down, but that VM has a GPO policy so there is no shutdown button. This made me curious to find out what caused the shutdown. Proxmox webGUI: Here I see nothing of interest in the task list. The VM was shutdown for a backup, but that was a few...

You are right, performance might also be a thing in a homelab. And this PDF proofs my point even further. While the Samsung SM863 is a "server grade SSD", it is almost 10 years old and gets outperformed in many metrics by basically all existing (none QLC) consumer drives on the market ;) But on...

That is because ZFS allows for really bad setups with write amplification. Take notice that these problem cases are always some obscure RAIDZ1, QEMU instead of RAW, TrueNAS as VM, Windows Server with 30TB drive as a network share, cases. It is almost never the "Proxmox with ZFS mirror boot and...

Only? I don't know what your workflow is, but most Proxmox installations don't have 1 drive write per day. And even if, that would be over two years. SMART gives you wearout information (and most drives work even after reaching 100% wearout). For reference: My 990 Pro is at 1% and my WD RED...

Naja, bei HDD hast du halt bereits ab 50% Platte voll eine Performance Einbusse, wenn du sie für blockstorage verwendest. Einem RAIDZ2 mit 80 TB ist es hingegen ziemlich schnuppe, ob der pool bereits mit 90% (also 72TB) gefüllt ist. Darum war die Regel halt schon immer Schwachsinn.

You guys are IMHO way overthinking it. Consumer NMVE in a ZFS mirros are even fine for boot +10 VMs, let alone for boot alone.

Das ist eine veraltete Regel, die für HDD und deren free space fragmentation performance basierte. Die Regel war damals schon eher so mäh. Was für ein RAID hast du genau? Vermute mal CT Volumes. Was siehst du dort in Bild 2?

Vielleicht was krumm gelaufen beim erstellen des Sticks? Den mal neu machen? Secure boot kannst du aktiviert lassen, Proxmox kann es seit 8.1

Mit Datenblatt meinst du vermutlich sequenzielles schreiben grosser Dateien. Das halt ich für den Workload auch für irrelevant. DRAM kann bei beiden gleich gut sein (für async writes) und sollte nix mit PLP zu tun haben. PLP ist ja nix anderes als den volatilen DRAM mittels Kondensatoren zu...

PLP SSD beschleunigt keine async writes, jedenfalls nicht zwangsläufig besser als der Cache einer nicht PLP drive. Bei PBS hast du AFAIK nur async writes.

That is probably a leftover of the old TrueNAS rule, that was never really that good. TrueNAS replaced that rule with "minimum 16GB" and then later on even to "minimum 8GB". You are right, forgot about that (new?) max value. That wasn't implemented with the old 50% setting, right? Makes the...

Verstehe den Netzwerkaufbau leider nicht wirklich und bräuchte eine Zeichnung. Aber vielleicht hilft dir das: Meine bridge config von Proxmox sieht exakt genau gleich aus. Was ich aber nicht rausgefunden habe, ist ob Proxmox eine Art Definition des Management VLANs zulässt. Das Proxmox GUI...

So you guys have problems with ARC (not with TXG) shrinking fast enough? Never had an issue an my 3 machines, but good to know that this might become an issue.

That one I can understand and IMHO deserves another topic. I think it would be probably better to not show ARC in the dashboard. Or at least not in that aggressive red way. Windows Task manager does this in a good sneaky way. Cache uses (just like free space) white as background color. Only a...

Help me understand the new ARC limit default of 10% instead of 50%. The only OOM scenarios, where unshrinkable TXG is a problem, I can come up with are: A: System with 32GB RAM and 10GBit NIC. 10% instead of 50% limits TXG to 3.2GB instead of roughly 5.8GB (limit is not ARC settings but...

Nice writeup, but I am still uncertain about some parts. By default, Proxmox has no SWAP, when installed on ZFS. To me, this makes sense, since swapping to a CoW FS probably isn't great. Slow, unnecessary TBW. Since the SWAP disk of a VM is on the RAW disk, which is in return on the ZFS of...