onionoo-backend-01 and -02 swapping
07:45:32 <nsa> tor-nagios: [onionoo-backend-01] swap usage - percent is WARNING: SWAP WARNING - 19% free (372 MB out of 2047 MB)
12:37:25 <nsa> tor-nagios: [onionoo-backend-02] swap usage - percent is CRITICAL: SWAP CRITICAL - 8% free (157 MB out of 2047 MB)
according to my (Nagios, email) logs, this started around march 2021. according to Grafana, it's pretty much a steady increase.