if you get out of disk space and delete log files, and you don’t see your disk space reclaimed, you may have found an issue that I faced with rsyslog not releasing rotatable files.
To be sure:
lsof | grep deleted
In the first column, you may see the process still handling the file descriptor unclosed and preventing the disk usage reclaim even after deletion.
The solution: systemctl restart rsyslog.service or kill the guilty process.