When Replication Server deletes rows from the ERSSD, for example when Replication Server deletes exceptions from the exception log, the ERSSD database does not release the space back to the ERSSD filesystem.
Use the sysadmin erssd command with the defrag parameter to recover any unused space, shrink the ERSSD size, and rebuild the ERSSD database file. The defrag parameter uses the dbunload SQL Anywhere command to rebuild the ERSSD.