Oct 2025 - Repmigrate OEM Tool

I want to highlight Repmigrate, a very handy tool that lets you migrate Oracle Enterprise Manager (OEM) database repositories between different platforms. The OEM repositiory database holds the configuration data for your Enterprise Manager monitoring system as well as the historical performance metrics and data. It uses datapump so you have all the advantages of exporting and importing the data as well. Traditionally you couldn't migrate an OEM repository using export import because Oracle stored metadata in non user tablespaces meaning you were limited to backup/restore, clone or other methods that migrate the entire database.

I had a client recently who needed this migration method due to a complex configuration of external TDE HSM encryption and this tool came to the rescue providing a supported method. It is also supported for use even between homogeneous environments as mentions in the FAQ (Doc ID 3014123.1).

For more information and where I initially found out about the tool look at the excellent blog entry of Sumesh Balakrishnan the Oracle Product Manager.

The product documentation referenced below was comprehensive but we did run into quite a few challenges during the implementation which were overcome with the help of Oracle support but I'd recommend you have a look at this tool especially if you are migrating OEM between heterogeneous environments.

A high level overview of what happens with the Repmigrate tool:

Component Diagram
  1. Perform the export.
  2. Perform the import.
  3. Reconfigure OMS to point to new Repository.

References:

  1. Sumesh Balakrishnan - Product Manager:
    Simplifying Cross-Platform repository database migration with RepMigrate
    Blog
    LinkedIn
  2. Official Oracle Documentation:
    Cross Platform Enterprise Manager Repository Database Migration 13.5
    Cross Platform Enterprise Manager Repository Database Migration 24.1
  3. Oracle Support Notes:
    3086094.1 EM 13.5: Cross Platform Repository Database Migration Using RepMigrate Utility
    3014123.1 OEM 13C: FAQ for Cross Platform OEM Repository Database Migration