Cloudron v9: huge disk I/O is this normal/safe/needed?

[imc67]

@girish said in Cloudron v9: huge disk I/O is this normal/safe/needed?:

'docker stats'

it's impossible to have a view with this, every second tens of docker containers are created (cron?) so it keeps listing and growing.

Is there a proper way to do some inspections with disk I/O in mind? Or shall I give you access to have a view?

[james]

Hello @imc67
Could it be that you simply need to zoom out of your terminal or make the window larger?
Had the same first thought when running this command but when resizing the window or zooming out:

[imc67]

@girish right but where to look?

[james]

Hello @imc67
Can you run the following command:

iotop -aoP

This gives a live view of what is currently writing IO to the disk.
Maybe this output can give some more indications where this is coming from.

[imc67]

its not default installed:

Command 'iotop' not found, but can be installed with:
apt install iotop    # version 0.6-24-g733f3f8-1.1ubuntu0.1, or
apt install iotop-c  # version 1.21-1

[nebulon]

yeah it is not installed by default, but you can safely install iotop via apt on your system.

[imc67]

and now?

[james]

Hello @imc67
You can either deselect it or press OK, restarting services should cause no issues.

[imc67]

ok thanks, below the result after just a few minutes, I'm not a technician but as far as I can see it's mainly mysql which is writing (I sorted Write):

[nebulon]

Since we debugged some other issue on that server, was also taking a look at the disk I/O. So basically the mysql service is doing a lot of disk I/O (also as see in the screenshot).

It does seem the mysql addon is just queried and written to a lot. So likely one of the many installed apps using it might commit a lot to the database. I didn't want to stop apps, but maybe you can try to stop individual apps which use mysql one-by-one to hopefully find the one which causes the constant writes.