Since I have up'ed to the 21.1.9 The SWAP is hitting 90% usage...
Previously, it would not exceed 40%
Looks like...
80423 root 103 0 16 10 CPU7 7 533:45 100.00% /usr/local/bin/python3 /usr/local/opnsense/service/configd_ctl.py -e -t 0.5 system event config_changed (python3.7)
81278 root 52 0 39 18 select 2 395:59 21.58% /usr/local/bin/python3 /usr/local/opnsense/scripts/netflow/flowd_aggregate.py (python3.7)
Kill the 100% CPU python process in the top line and it should be fine then.
Discussed here: https://forum.opnsense.org/index.php?topic=24095.0
A late reboot fixed it...