When you use LVM, in the USE node monitoring dashboard, you see disk saturation, by device mapper (dm).

The challenge is to map this to the kubernetes pv, this is how to do:

On the node, run the follwoing command:

```
dmsetup ls --tree -o blkdevname | grep dm-80
data--1-small--22 <dm-80> (253:80)
```

And then, run this on kubernetes:

```
k get pv  -o custom-columns=NAME:metadata.name,PATH:spec.local.path,PVC:spec.claimRef.name,NODE:spec.nodeAffinity.required.nodeSelectorTerms[0].matchExpressions[0].values[0] | grep nodename | grep vol_1_22
local-pv-ea776176   /mnt/small/vol_1_22   pgdata-pg-xx-1                                        nodename
```

Now you know the responsible!
