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0e5f506a78
PVE's node rrddata uses a different column schema than guest (qemu/lxc) rrddata for the same stats: memtotal/memused instead of maxmem/mem, swaptotal/swapused instead of maxswap/swap, roottotal/rootused instead of maxdisk/disk. decodeRRDPoints only ever looked for the guest names, so on node rows mem/swap/disk silently decoded to zero and fell into Extra unused — this is why the Custom Dashboard's Fleet Trend memory chart (which pulls node rrddata) was stuck at 0B. Node RRD fetches now alias those columns onto the same typed fields guest RRD already uses.