What does Block I/O for apps represent? Seems too high

TrueNAS General
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1

I have my first TrueNAS SCALE system in place for a few weeks now, so far seems to be working well.

For the apps I have installed, in the applications table (as well as in the dashboard app widget) there is an entry for Block I/O. In both places the values are the same. I expected that they represent the amount of I/O that the apps are consuming at the current moment (in the widgets the values are in xxx/s). However the actual values seems way too high, almost like a cumulative amount. For example, Plex app is reporting 4.6 TiB/s reads!!! All the other apps also show very high numbers - my current disk I/O total accross all disks is in the single MiB / s range in the reports screen. Is this an issue with the apps screen or am I supposed to interpret this differently?

Screenshot 2025-05-09 at 7.54.15 PM 4
Screenshot 2025-05-09 at 7.54.15 PM 4866×636 42.5 KB

2

Lets start with the version of software you are running?

The Read readings are clearly too high. There might be a similar bug reported.

3

I’m running SCALE 25.04.0

4

Looks like NAS-134286 exists for this, though not much detail. The reported value is cumulative as opposed to realtime, restarting the app should reset it to zero, same as the “Block I/O” column in the apps pane.

5

Thanks - looks like this is probably it, so I’ll wait for the fix which looks like maybe it will be part of 25.10. I can’t tell from looking at the ticket that it was the cumulative value that is showing, or what is wrong with the network I/O since that was also referenced in the ticket.