Transactions 
The Performance user menu of the DBA Cockpit contains a display of active transactions.
Procedure
Open the DBA Cockpit (transaction DBACOCKPIT) and select 
Performance 
Transactions 
.
Result
You see an overview of the transactions.
More Information
Database Administration in CCMS, Execute Performance Analysis in CCMS
Concepts of the Database System, Transactions
SQL Reference Manual, Transactions