Database Component | Types of Data | When Data is Written |
ISInternal | Service results, scheduled tasks, client certificate mappings, run-time data for pub.storage services, guaranteed delivery transactions, trigger joins, active OpenID requests, WS-ReliableMessaging runtime data, and configuration and runtime data for OAuth and Account Locking. | You are using the features listed in the Types of Data column |
ISCoreAudit |  Error, guaranteed delivery, service, security, and session audit data. | The audit logger for the type of data is enabled |
| Documents that are in doubt, have failed, or have exhausted trigger retries. | You are using triggers | |
CrossReference | Cross-referencing data for publish-and-subscribe solutions. | You are using publish-and-subscribe solutions |
DocumentHistory | Document history data for exactly-once processing in publish-and-subscribe solutions. Integration Server uses the data to detect and reject duplicate documents. | You are using exactly-once processing |
DistributedLocking | Information that coordinates access to resources across distributed servers and processes. | Executing services in the pub.storage folder. |