There are performance problems in system operation.
Today / tomorrow I'll be reconfiguring the database.
Possible problems with system availability.

The database has been transferred to a dedicated virtual machine (SSD storage).

In a few days we will see if the performance has improved.

There was a problem.
The tasks are probably too short and with more hosts the server has performance problems.
I think this is an Apache2 issue (configuration?).
Yesterday I tried to change the configuration but I didn't get much better performance.
I will change iThena CNode task time.