You can store Horizon events on an SQL database or an Oracle database. For the Oracle and SQL database versions that View supports, see the installation document for your Horizon version.
For Horizon environments that use an Oracle events database, you might need to update the ODAC client libraries on the server where the vRealize Operations for Horizon broker agent is installed.
To update a 64-bit system, go to http://www.oracle.com/technetwork/database/windows/downloads/index-090165.html and download the ZIP file from the 64-bit ODAC 11.2 Release 4 (188.8.131.52.0) Xcopy for Windows x64 link and follow the instructions in the readme.html file included in the ZIP file.
The broker agent does not support 32-bit systems.