After having re-installed a fresh copy of dragonfish 3 times for various buggy issues, I am once again in a situation where the webui just dies. Eventually my uptime monitors start to fail and then downtime happens for a few seconds for the apps. An hour after booting the system, the webui no longe…

Cross-posting for visibility. We can confirm that the significant contributor to the issue that has been reported in this thread and others is related to a Linux kernel change in 6.6. While swap adjustments proposed can mitigate the issue to some degree, the multi-gen LRU code in question will be …

[image] sfatula: You can set it to 0 (which does not mean never swap but close) I think this is a saner solution than outright disabling swap. The last thing someone wants their NAS server to do is crash or have applications fail due to OOM.

[image] sfatula: Your example of Kris was not a guy with performance “so bad”. He actually said the opposite elsewhere, perhaps reddit, he had indicated it wasn’t an issue for him but he wondered why. Perhaps my tongue was not firmly in my cheek enough. The 2nd guy was me btw.

But setting it zero does disable (according to what I found) causing OOM. And setting it to 1 doesn’t work.

[image] Stux: And setting it to 1 doesn’t work. Why can’t we just have nice things? :cry:

That what I was trying to say (eliminating all swap space typically bad idea) but as always never communicate terribly well. I know people from freeBSD think of swap differently, and for good reason! It might be ok until they find the issues for this webui/truenas issue as a mitigation thing, I prob…

I use zram on my Raspberry PI 5 desktop. I have 32GB zram and 8GB ram and it’s fast (an advantage of not using an overpowered machine is for debugging or seeing how well something actually performs). No idea how it interacts with ZFS, never tried it. I have been impressed with zram. I guess for low …

[image] sfatula: I guess for low memory machines it might be a loss and it’s taking away some ram. But if nothing ever gets “swapped”, the zram remains at 0% size. It only dynamically grows/shrinks based on swapping in and out. (As far as I understand.)

[image] winnielinnie: But if nothing ever gets “swapped”, the zram remains at 0% size Yes, I believe that is correct. I’m just saying if you do need to use the swap, it might be worse for low memory machines (as far as this problem). Not sure, didn’t ponder it much. But that is how zram works…

Great, we have a solution. Now, for newbies, how do you proceed to set swappiness to 1 exactly

Going insane, truenas webUI dies, again

TrueNAS General

winnielinnie May 8, 2024, 12:58am 55

What does everyone think of this?

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Going insane, truenas webUI dies, again

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