Hi there, did by chance anyone notice the CPU usage of the middlewared service increasing by quite a margin (x2/x3) after you have used the GUI for a while ? I mean usually it sits around 1% and when you are navigating the GUI it of course goes up. But even after closing the GUI i had the middlewar…

This is how middlewared behaves after 2 days - no workers doing anything, not logged into GUI: [grafik] and this is how it behaves 10 minutes after a restart of the service: [grafik] You rarely see any cpu usage at all. Maybe i’m just interpreting things wrong, but it looks to me like some reg…

I have the same problems. And I’ve noticed that it has something to do with Virtual Machines. Running HAOS from a VM increases the CPU load by 2-3 times. And if I use a TrueNAS GUI, it grows even further. If I run HAOS from Incus, then are no problems. Unfortunately, at 25.10 the Incus VM autostart …

Hmm i actually doubt that - cause vm are running under qemu and i never had any incus based VMs. But yes i agree using the GUI makes things worse and somehow increases the CPU usage of the middlewared service over time even if the GUI isn’t actively being used. I really wonder if the midclt calls i …

I’m observing the same thing in my TrueNAS 25.10.0.1 installation. It’s a new installation, around 10 days old. Runs three containers with minimal (i.e. 0%) CPU load. It’s not being actively used as a file server yet either. In fact, it has no shares yet. However, services’ memory use is slowly inc…

My experience is similar. Gradual increase in memory usage clearly visible in the memory stats (TrueNas Scale GUI). I’m on 25.10.1. First thing that crashes due to out-of-memory error is the VM running HAOS.

Well, i uhmm “solved” or rather mitigated the problem by restarting middlewared on a daily basis (scheduled task): service middlewared restart

I mean, it can technically work [1] , but shouldn’t we file a bug report about this? [turn-it-off-and-on-again] Windows is doing this since forever. ↩︎

You can try searching Jira for report or attempt using Report a Bug. Easiest is Feedback / Report a Bug in the TrueNAS GUI. Smile icon on upper right. You can attach the debug dump at that time. Please provide a link to this thread in the Jira and post the link to your Jira ticket in this thread…

I see it too. A reboot or service middlewared restart brings CPU usage down again. 25.10.1 - Goldeye Backup server, no shares, only a few idling apps. [Skærmbillede 2026-02-17 kl. 10.54.50]

Increasing CPU Usage of middlewared Service on 25.10

TrueNAS General

sard January 31, 2026, 9:23am 11

Oh i did - but was a waste of time…

Topic		Replies	Views
Extremely poor performance on 25.04.2 TrueNAS General SCALE	53	1874	August 31, 2025
Consuming more RAM? 25.04.02 TrueNAS General	30	956	March 6, 2026
Asyncio_loop Over 100% CPU, middlewared, GUI slow - Seems Docker / GHCR / Custom App Related TrueNAS General SCALE	58	1525	February 28, 2026
Very slow WebUI - Login, Apps, etc. SCALE Dragonfish RC TrueNAS General SCALE , 24_04-Dragonfish , GUI	112	5202	May 26, 2024
Slow to No Access to Web interface (long loading screen) TrueNAS General SCALE	15	1364	February 25, 2026

Increasing CPU Usage of middlewared Service on 25.10

Related topics