In reply to Martin Kolberg.

Hi Martin,
Those 22 byte ZIP files are created when no logs below /opt/sas/viya/config are eligible for archiving. That could mean that they haven't aged sufficiently or they are currently being used. I expect that in time you will begin to see those ZIP files grow in size once the aging threshhold has been met.
You can adjust the log archive threshhold by modifying the LogArchive task of the sas-ops-agent. You can add a -days nn parameter to the command to set the threshhold to the length you prefer.
Thanks for reading,
-Scott