Yes this is normal. These are scheduler processes. You can control this using below parameter in airflow.cfg
# The amount of parallelism as a setting to the executor. This defines
# the max number of task instances that should run simultaneously
# on this airflow installation
parallelism = 32
These are spawned from scheduler whose pid can be found in airflow-scheduler.pid file
so 32+1=33 processes that you are seeing.
Hope this clears out your doubt.
Cheers!
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…