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Other Types of Change Events: Gap and Overflow
Events
Other types of change events are provided to handle special situations, such as
capturing changes not caught in the Salesforce application servers, or handling high loads of
changes.
Gap Events
Change Data Capture tracks record operations that are part of transactions in Salesforce application servers by generating change events. However, some operations are applied directly in the database, outside of a transaction in the Salesforce application servers. For example, archiving of activities or a data cleanup job in the database. To not miss these operations, gap events are generated to notify you about those changes.
Overflow Events
To capture changes more efficiently, overflow events are generated for single transactions that exceed a threshold.
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