Hello Oliver,
Unfortunately when pasting the SQL statment into the reply some columns got lost.. however, I was wondering if you can create an incident on component HAN-DB-BAC and provide a HANA Studio service connection to the system affected? At the moment it is not clear to my why log backups are way smaller than the configured size (I expect to see that only when the log_backup_timeout_s was reached) and written every 1 to 3 minutes (which is much less than the timeout).
Best regards,
Michael
HANA Product Support