On my server I had files from 2012, 2013, ... 2016 which were
.MYI. I deleted files which were older than 180 days. I left the files from this year only.
Three days later database was gone and phpMyAdmin showed:
#2002 - The server is not responding (or the local MySQL server's socket is not correctly configured)
Could deletion of these old MySQL files have been the problem here?