I recently had some bigger database updates that took a while. I clicked the "Upgrade Piwik" button but nothing really happened. I wasn't sure whether it does anything or not so pressed the button again, still no indicator whether the update started. Not sure if this triggered the update process a second time. In the end I did a
show full processlist on MySQL to see whether the update started or not.
I would expect the Update button to be in a disabled state and to see a message or any kind of indicator somewhere.
we should make button disabled after click, maybe along with redesigning the update screen in #7450
The button was already disabled, but I changed the label when it's clicked.
does the trick!