The Oracle8 "Oracle8 Performance Utility 220.127.116.11.0" enables the Windows NT Performance Monitor to monitor Oracle8 database objects. For further details, refer to the Oracle8 Enterprise Edition Getting Started for Windows NT.
The Oracle8i "Oracle Performance Monitor for Windows NT" cannot co-exist with Oracle8i "Oracle Data Gatherer (a component of Oracle Intelligent Agent)" on the same computer. Select which component to install.
Consequently, when installing Oracle8, the "Oracle8 Performance Utility 18.104.22.168.0" can not be installed because it will prevent Oracle8i "Oracle Performance Monitor for Windows NT" from being installed.