I'm seeing the memory status on the luci-bootstrap theme report different values than free reports. Am I just missing something fundamental? Built from master at 921392e216
root@OpenWrt:/# free
total used free shared buff/cache available
Mem: 965988 24740 851512 440 89736 891532
Swap: 193196 0 193196
root@OpenWrt:/#
Kb vs Mb .. . ?
See, that doesn't explain the Used being reported as 5 times what free reports as used, or the cached vs buffered.
Edit: Let me clarify, I'm in the middle of tracking down a kernel memleak, which is already mis-reporting things under the 5.10+ kernel (5.4 is unaffected).. I just need to know what values I'm seeing are good, and if not, I won't rely on them (and just report it), but I wanted to make sure I wasn't just misreading it or not understanding the charts
True, didn't notice, perhaps the math is off...
I think buff/cache in free = buff + cache in openwrt, but I'm only guessing.
Close enough it looks like.. True Used + Buff/Cache = Luci's Used. I don't know if this is intentional or a left-over of an older time, but I'll issue it.
Well, LuCI status page calls ubus system info...
Results from live router.
OpenWrt SNAPSHOT, r19075-ed364cd4b0
-----------------------------------------------------
root@router1:~# free
total used free shared buff/cache available
Mem: 474156 106832 332664 3200 34660 323832
Swap: 0 0 0
root@router1:~# ubus call system info
{
"localtime": 1646955104,
"uptime": 180796,
"load": [
2144,
768,
32
],
"memory": {
"total": 485535744,
"free": 341303296,
"shared": 3276800,
"buffered": 53248,
"available": 332255232,
"cached": 28401664
},
"root": {
"total": 75920,
"free": 74804,
"used": 1116,
"avail": 70888
},
"tmp": {
"total": 237076,
"free": 233876,
"used": 3200,
"avail": 233876
},
"swap": {
"total": 0,
"free": 0
}
}
root@OpenWrt:/# free && ubus call system info
total used free shared buff/cache available
Mem: 965988 25300 850936 440 89752 890968
Swap: 193196 0 193196
{
"localtime": 1646948054,
"uptime": 8805,
"load": [
352,
928,
0
],
"memory": {
"total": 989171712,
"free": 871358464,
"shared": 450560,
"buffered": 22519808,
"available": 912351232,
"cached": 60690432
},
"root": {
"total": 834816,
"free": 693024,
"used": 141792,
"avail": 693024
},
"tmp": {
"total": 482992,
"free": 482552,
"used": 440,
"avail": 482552
},
"swap": {
"total": 197832704,
"free": 197832704
}
}
root@OpenWrt:/#
Or actually Total - Free ...
...since this commit from PR https://github.com/openwrt/luci/pull/3694 ...
Thanks @hnyman - Then I'll just chalk this up to working as intended and stick to free. I appreciate the help from you and @frollic !
Yeah, source is your friend 
I'll be honest.. luci scares me 
I don't have a basic knowledge of whatever scripting language it uses.
Older apps & pages use "lua" language for processing most of the stuff on the server-side (router), but newer stuff mainly uses javascript (for processing at the client browser).
Both languages are pretty easy to read if you know general programming concepts, and generic basic/C/whatever syntax etc.
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