- Upstart in Ubuntu provides a logrotate script that is run to compress session logs in ~/.cache/upstart/. So, by removing logrotate you have broken that facility.
- Upstart is correctly capturing the seemingly huge amount of data generated by these applications, so the problem lies with them.
However, in a sense your removing logrotate is good in that it has drawn attention to the problems with mediascanner and unity-panel-service.
I would encourage you to reinstall logrotate if possible.
This is not an Upstart issue:
- Upstart in Ubuntu provides a logrotate script that is run to compress session logs in ~/.cache/upstart/. So, by removing logrotate you have broken that facility.
- Upstart is correctly capturing the seemingly huge amount of data generated by these applications, so the problem lies with them.
However, in a sense your removing logrotate is good in that it has drawn attention to the problems with mediascanner and unity-panel- service.
I would encourage you to reinstall logrotate if possible.