Oracle Integration 3 Standard and Enterprise editions support only 32 days of data retention. During upgrade only the most recent 32 days of retained data will be migrated.

Oracle Integration 3 is also available in a Healthcare edition, which supports 184 days of data retention.

The activity stream in Oracle Integration Generation 2 is not moved to Oracle Integration 3. Therefore, after the upgrade completes, historical data for your integrations isn't available in Oracle Integration 3.

The activity stream feature is available in Oracle Integration 3. Therefore, historical information is available from the upgrade date onward.

If you capture the activity stream in Oracle Cloud Infrastructure, this information remains available after the upgrade. If you don't capture this data yet, you can start at any time. See Capture the Activity Stream in Oracle Cloud Infrastructure Console.

When the downtime begins as part of the upgrade, Oracle Integration stops accepting incoming requests for actively running synchronous integrations. Oracle Integration also finishes processing all previously received requests in a few minutes.

During the downtime, any client that sends a request to Oracle Integration gets a failure notice.

After the upgrade finishes, Oracle Integration accepts incoming requests again.

When the downtime begins as part of the upgrade, Oracle Integration stops accepting incoming requests for actively running asynchronous integrations. Oracle Integration also finishes processing the previously received requests. In most cases, Oracle Integration processes the requests in a few minutes.

After the upgrade finishes, Oracle Integration accepts incoming requests again.

Before upgrade, you must decide what to do with asynchronous messages from the client side for the duration of the downtime. See Decide what to do with asynchronous messages.

When the downtime begins as part of the upgrade, Oracle Integration stops accepting incoming requests for scheduled integrations and finishes processing all previously received requests. In most cases, Oracle Integration processes the requests in a few minutes.

Any requests that Oracle Integration doesn't process in a few minutes are discarded, but no data is lost. Here's why: Oracle migrates the global schedule parameters for the integration and starts the schedule in Oracle Integration 3. After the upgrade is complete and Oracle Integration 3 begins processing requests, Oracle Integration 3 uses the parameters to start processing where Oracle Integration Generation 2 stopped processing.

The post-upgrade cut over is seamless, but depending on when your upgrade occurs, you might experience some business impact. For instance, if an integration sends emails every 30 minutes starting at 9 AM, and your upgrade is from 8:30 AM to 10:30 AM, the email that usually arrives at 9 AM will probably be delayed.

Oracle does not migrate failed integration instances to Oracle Integration 3.

Additionally, by default, a failed integration instance prevents an upgrade from succeeding. However, an override is available. To upgrade even when you have one or more failed integration instances, you must select the override setting when you schedule the upgrade. If you don't select this setting and have one or more failed integration instances, the upgrade fails.

To learn about your options for failed integration instance, see Determine what to do with failed instances.

To learn about the setting that lets you upgrade with a failed integration instance, see Configure Upgrade Settings or Reschedule Upgrade.

Insight isn't supported in Oracle Integration 3. Your Insight models and consoles won't be migrated when you upgrade to Oracle Integration 3. As an alternative, use Oracle Cloud Infrastructure Logging Analytics and Process Automation Analytics.