The template "Oracle by ODBC" have a wrong SQL on the item:

• uuid: 3839683749974cdeafd9178bdccb38d6
            name: 'Oracle: Get system metrics

The select below is wrong:

     SELECT 'REDO::Available', count(*) from v$log t where t.status in ('INACTIVE', 'UNUSED')

Line 113 on current version of git: https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates/db/oracle_odbc/template_db_oracle_odbc.yaml

That is wrong because the item should colect the # of available REDO and this select get the # of Unvailable REDOs..

Should be modify the "in" to "not in"