runing"sudo apt upgrade" got two upgrade process

[greatest jie]

First of all,thanks to all developers，without your efforts the world wouldn't be so great！
I'm newer to Linux OS，so maybe there are something that I don't know that I should‘ve known。
here is my problem：
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I was up to install something new with apt，before running:
”sudo apt install XXX“
,I knew I should run "sudo apt update" first,and I did.
after that,the shell didn't show any problem.
then,I ran
"sudo apt upgrade".
At first,it seems ok,but then the whole progress stucked at "Progress: [ 89%]",and I waited ,nothing else happened.
Then I read about the feedback of the shell,and I think maybe there's something wrong with mysql:
/*
Setting up python3.8 (3.8.10-0ubuntu1~20.04.5) ...
Setting up bind9-host (1:9.16.1-0ubuntu2.11) ...
Setting up php7.4-gd (7.4.3-4ubuntu2.13) ...
Setting up mysql-server-8.0 (8.0.30-0ubuntu0.20.04.2) ...
mysqld will log errors to /var/log/mysql/error.log
mysqld is running as pid 697365
*/

Then I opened another command shell,run:
ps -aux |grep apt
here I met the real problem:

root 675283 0.0 0.0 11860 692 pts/0 S+ 03:29 0:00 sudo apt upgrade
root 675284 0.2 2.0 88704 19324 pts/0 S+ 03:29 0:02 apt upgrade

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OS version: Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-113-generic x86_64)
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What I don't understand is: why is there two apt upgrade(even maybe it's mysql's problem, and actually I just ran update once).Is there someone can help me understanding this?

Thanks again! Best reguards!

[greatest jie (greatestjie)]

I'm sorry,I just realize that here is a place about “ManPage”.