What does the ZFS row mean when it's at 100 on the dashboard for system stats?

[HH0718]

Is it normal for it to nearly always be at 100?

 

 

[JorgeB]

Yes, that's the ARC stats, by default it's set to 1/8 installed RAM, and in normal use it should be at or near 100%, though should not be over 100%, possibly a display error, post output of:

cat /proc/spl/kstat/zfs/arcstats | grep "^c"

 

[HH0718]

c                               4    6303836160
c_min                           4    1575959040
c_max                           4    6303836160
compressed_size                 4    3895346176
cached_only_in_progress         4    0

Thanks! Once again, Jorge

[JorgeB]

So it's right at 100% usage (c = c_max), so all good, some display error.

[HH0718]

Once again, thanks for your help and time!

[MaggifiXXLL]

Is this confirmed that this is a display error?

And is there any way to expand the arc cache? 

 

At moment my system has 32GB Ram and i only switched some roundabout 3TB of pool space to zfs and its constantly at 90-103% 

I planned to switch my 14TB main Pool to ZFS and add some ram but how do i get shure there is enough arc space if the 100% is a display error? 

 

[JorgeB]

28 minutes ago, MaggifiXXLL said:

Is this confirmed that this is a display error?

Looks like sometimes ARC size can really go beyond the set limit, only temporarily and should then auto-adjust, but next release will have a hard limit of 100% to avoid confusion.

 

30 minutes ago, MaggifiXXLL said:

And is there any way to expand the arc cache? 

https://docs.unraid.net/unraid-os/release-notes/6.12.0#zfs-pools

 

 

30 minutes ago, MaggifiXXLL said:

hure there is enough arc space if the 100% is a display error? 

100% is not a display error, 101% was, or like mentioned next release won't go above 100%

17 hours ago, JorgeB said:

and in normal use it should be at or near 100%