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 evictable ARC portion, which could make the displayed free memory and ARC size look different from what is observed through SSH.
We will arrange for our team to review and analyze this behavior further. Your detailed calculation and observations are helpful for our investigation.
Thank you again for bringing this to our attention.