As shown below, the memory usage is shown as only 71.5% in Resource Monitor, while swap is used heavily and the cache is really low. This looked weird as I believe in a general Linux system, after running steadily for long enough time and doing enough I/O, ARC and cache usage should go high and take…

Hello, there is the same post in the german sektion [image] QuTShero, der Ressourcenmonitor zeigt falsche RAM-Werte an Deutsch Die Anzeigen des Ressourcenmonitor unter QUTShero (h5.2.8.3359) zum ZFS-ARC und dem freien RAM sind falsch. QNAP hat bei hero die W…

Yes I think they’re the same issue

Hi @taoyouh12138 , Thank you for reporting this issue and for sharing the detailed comparison between Resource Monitor, free, and /proc/lpl/kstat/zfs/arcstats. We understand your concern that the ZFS ARC usage shown in Resource Monitor may not fully reflect the actual ARC usage, especially the evi…

Resource Monitor under-estimates ARC size

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Becker2020 June 24, 2026, 3:40pm 2

Hello,

there is the same post in the german sektion