Clear collectd/stats graph with empty data

I've tested some collectd plugin, but now I've removed them, but I still have the empty graphs in LuCI.

I'm writing external data to a USB disk, is there a way to clear the unused plugin graphs?

Fopr example, I've disabled the I/O disk stats from the disk "ubiblock0_0" but the graph is still here, and I want only the other two that are working correctly:

Thanks!

Simple.
Just delete the unnecessary rrd database files. Delete the file for the outdated device.

There is one *.rrd database file per database item.
(typically in /tmp/rrd/openwrt/... )

example from my router:

root@router1:~# tree /tmp/rrd/router1/
/tmp/rrd/router1/
├── conntrack
│   ├── conntrack-max.rrd
│   ├── conntrack.rrd
│   └── percent-used.rrd
├── cpu-0
│   ├── percent-idle.rrd
│   ├── percent-interrupt.rrd
│   ├── percent-nice.rrd
│   ├── percent-softirq.rrd
│   ├── percent-steal.rrd
│   ├── percent-system.rrd
│   ├── percent-user.rrd
│   └── percent-wait.rrd
├── cpu-1
│   ├── percent-idle.rrd
│   ├── percent-interrupt.rrd
│   ├── percent-nice.rrd
│   ├── percent-softirq.rrd
│   ├── percent-steal.rrd
│   ├── percent-system.rrd
│   ├── percent-user.rrd
│   └── percent-wait.rrd
├── cpufreq-0
│   ├── cpufreq.rrd
│   ├── percent-1000000.rrd
│   ├── percent-1400000.rrd
│   ├── percent-1725000.rrd
│   ├── percent-384000.rrd
│   ├── percent-600000.rrd
│   ├── percent-800000.rrd
│   └── transitions.rrd
├── cpufreq-1
│   ├── cpufreq.rrd
│   ├── percent-1000000.rrd
│   ├── percent-1400000.rrd
│   ├── percent-1725000.rrd
│   ├── percent-384000.rrd
│   ├── percent-600000.rrd
│   ├── percent-800000.rrd
│   └── transitions.rrd
├── entropy
│   └── entropy.rrd
├── interface-br-lan
│   ├── if_dropped.rrd
│   ├── if_errors.rrd
│   ├── if_octets.rrd
│   └── if_packets.rrd
├── iwinfo-wlan0
│   ├── bitrate.rrd
│   ├── signal_noise.rrd
│   ├── signal_power.rrd
│   ├── signal_quality.rrd
│   └── stations.rrd
├── iwinfo-wlan1
│   ├── bitrate.rrd
│   ├── signal_noise.rrd
│   ├── signal_power.rrd
│   ├── signal_quality.rrd
│   └── stations.rrd
├── load
│   └── load.rrd
├── memory
│   ├── memory-buffered.rrd
│   ├── memory-cached.rrd
│   ├── memory-free.rrd
│   ├── memory-slab_recl.rrd
│   ├── memory-slab_unrecl.rrd
│   └── memory-used.rrd
├── ping
│   ├── ping-87.92.0.1.rrd
│   ├── ping_droprate-87.92.0.1.rrd
│   └── ping_stddev-87.92.0.1.rrd
├── thermal-thermal_zone0
│   └── temperature.rrd

Oh, what a simple thing :slight_smile: my directory is on /mnt/sda1, done, thanks a lot!

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