为什么gunicorn会显示一个额外的进程?

bind = '0.0.0.0:8001'
loglevel = 'debug'
errorlog = '-'
accesslog = '-'
preload = True
reload = True
workers = 2

我的gunicorn命令是:

gunicorn -c gunicorn_conf.py project.wsgi:application

我希望它只显示 2. ps aux 容器中或 docker top 但事实证明,它有三个类似于下面的一个

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.1  21756  2600 ?        Ss   21:48   0:00 /bin/bash /usr/src/app/entrypoint.sh
root         6  0.0  1.0  97424 21860 ?        S    21:48   0:01 /usr/local/bin/python /usr/local/bin/gunicorn -c gunicorn_conf.py project.wsgi:application
root        11  2.7  3.2 310404 65560 ?        Sl   21:48   1:20 /usr/local/bin/python /usr/local/bin/gunicorn -c gunicorn_conf.py project.wsgi:application
root        12  2.7  3.2 310408 65572 ?        Sl   21:48   1:20 /usr/local/bin/python /usr/local/bin/gunicorn -c gunicorn_conf.py project.wsgi:application