Apache2 proxy showing 2 slots and PIDs? - apache

Question

I'm running one single tomcat webserver behind an apache2 proxy. But
localhost:443/status shows:
Slot PID Stopping Connections Threads Async connections
total accepting busy idle writing keep-al closing
0 1578 no 0 yes 0 25 0 0 0
1 1577 no 1 yes 1 24 0 1 0
Sum 2 0 1 1 49 0 1 0
I wonder why I might have 2 PIDs running? Especially what I don't like is that apache has 50 workers, but reserves 25 worker threads for each of the PID. Ideally I'd want to to have all 50 workers reserved for the tomcat server.
Could this be due to my setup of 2 virtual hosts in /etc/apache2/sites-enabled/mypage.conf:
<VirtualHost *:443>
..
</VirtualHost>
<VirtualHost *:80>
Redirect / https:myserver.com/
</VirtualHost>
I'm just having this to redirect any non-https requests. Could this trigger those 2 PIDs? If yes: most likely only a few requests will come on port 80, so I would want to assign most of the workers to the https host. Is that possible?
What I also noticed: ps aux | grep apache2 gives 5 processes:
www-data 1577 0.0 0.1 2090340 14644 ? Sl 06:25 0:04 /usr/sbin/apache2 -k start
www-data 1578 0.0 0.1 2024812 12948 ? Sl 06:25 0:05 /usr/sbin/apache2 -k start
root 1679 0.0 0.1 92580 8196 ? Ss Jan08 0:44 /usr/sbin/apache2 -k start
www-data 1757 0.0 0.0 19904 172 ? Ss Jan08 0:29 /usr/bin/htcacheclean -d 120 -p /var/cache/apache2/mod_cache_disk -l 300M -n
mysshusr 19322 0.0 0.0 14856 1100 pts/0 S+ 10:53 0:00 grep --color=auto apache2
Are those the worker threads?