The "Trace" log level expires after 10 minutes and the log files are removed after 1 hour. The "Trace" log level is the most detailed log level that can be set for an integration flow. It records all the information about the message processing, such as headers, properties, payloads, attachments, and exceptions. However, it also consumes more resources and storage space than other log levels. Therefore, it is recommended to use it only for troubleshooting purposes and for a short duration. The "Trace" log level can be activated from the Monitor Message Processing view or from the integration flow editor. Reference: Log Levels | SAP Help Portal, Activating Trace Log Level | SAP Help Portal