L2ARC not showing in ZFS stats in 23.10

[JDE1000]

Upgraded to 23.10RC and to 23.10.0 stable. My l2ARC is not showing in ZFS reporting. It does show up in Netstat.

 

[MrGuvernment]

Not sure why it is not showing, but will say, for your set up, it likely is not even being used or effective? Also, drives in a pool connected via USB?not recommended at all.

 

[redpixy]

Does your cache vdev disk size show up in the storage Topology?
I seems to be facing a weird issue where after rebooting the cache vdev would show up as "1 x ?"

Had to remove and readd to the pool as a cache vdev for it show the disk size.

 

[probain]

'Sup

I've got a Jira for when the L2ARC isn't recognized after reboots, here NAS-124808

I also have a Jira registered that the L2ARC is missing from the reporting page, here NAS-124809

 

[JDE1000]

Does your cache vdev disk size show up in the storage Topology?
I seems to be facing a weird issue where after rebooting the cache vdev would show up as "1 x ?"

Had to remove and readd to the pool as a cache vdev for it show the disk size.

Yes it does show in Disks and Storage

 

[alexmarkley]

It looks like I'm also experiencing this issue.

Developers, do you all need more debug logs? If so, how can I help?

 

[redpixy]

Not sure if this a bug, but my cache drive on the UI is showing as 1x? while in cli i do see the drive.

As for the L2Arc, i facing the same issue as the thread starter.

 

[jackenhack]

Same problem here. After every reboot, the cache drive shows up as 1x?. Even after removing and adding the cache drive again to remove the 1x? problem, no statistics for L2ARC under statistics reporting.

 

[redpixy]

Same problem here. After every reboot, the cache drive shows up as 1x?. Even after removing and adding the cache drive again to remove the 1x? problem, no statistics for L2ARC under statistics reporting.

Yes, on the UI side the L2ARC doesn't seems to show in the reporting. But if you enter arc_summary in shell you should be see if the L2arc is being used.

 

[ABain]

Several bugs were reported for L2ARC, (some shared above by @probain) fixes are planned in 23.10.1.

 

[base04__]

Still running into this issue in 23.10.1.1
tried readding the l2arc, but still no stats

 

[probain]

Still running into this issue in 23.10.1.1
tried readding the l2arc, but still no stats

It's not showing under Reporting/ZFS for 23.10.1.3 either. However, if you install the app Netdata. You'll get the L2ARC reports you (probably) are looking for.

What is fixed though, is that the L2ARC now doesn't show as a '?' any more. When looking in the Storage Dashboard

 

[Stux]

Is this fixed in 23.10.2, because I'm not seeing any L2ARC stats in reports in my freshly migrated install.

Using arc_summary I do see l2arc stats

Code:

L2ARC status:                                                    HEALTHY
        Low memory aborts:                                             0
        Free on write:                                                 4
        R/W clashes:                                                   0
        Bad checksums:                                                 0
        Read errors:                                                   0
        Write errors:                                                  0
L2ARC size (adaptive):                                         447.6 GiB
        Compressed:                                    77.4 %  346.5 GiB
        Header size:                                    0.1 %  396.1 MiB
        MFU allocated size:                             4.9 %   17.0 GiB
        MRU allocated size:                            94.8 %  328.6 GiB
        Prefetch allocated size:                        0.3 %  961.6 MiB
        Data (buffer content) allocated size:          99.1 %  343.3 GiB
        Metadata (buffer content) allocated size:       0.9 %    3.3 GiB