InfluxDB going crazy - max CPU

My InfluxDB has just gone crazy again - basically 100% of all CPU on a Pi4.

It has happened before but I thought it was a problem with Glances, but not this time.

Anyone else had a problem with this addon. Great when it works but a PITA when it doesn’t.

I have no idea how to debug it? Could it be disk, is something hammering it for queries, is there corruption in the Database?

Any ideas?