Fridh GT - systemstats - CPU usage - Linegraph all value = -nan

[ericplougastel]

Hello,
excuse my english, I'm french.

I'm using cacti 1.2.24 on a server debian 11 (client is debian 11 too) and when I create a new graph Fridh GT - systemstats - CPU usage - Linegraph all value keep at -nan.
The new graph create a file .rrd on the first polling after the creation, but after at the other polling, it's not modified.

For the graph new graph Fridh GT - systemstats - I/O - Linegraph, it's OK
For the old graph (create a long time ago on other client) Fridh GT - systemstats - CPU usage - Linegraph, it's OK

I don't understand what is the issue, can you help me ?

[ericplougastel]

workaround:

when creating the file: .../cacti/rra/*_sscpurawidle_*.rrd the file is 328936 bytes and we see that the other files created previously and functional are 656704 bytes

a copy of a functional file on the newly created file (keeping their respective names) allows polling to work again.

this is not a solution, but the graph work

anyone know which script create the file to try to correct it ?