SQL Locks: Wait Situations
The Locks user menu of the DBA Cockpit contains, among other things, a display of wait situations for exclusive locks (exclusive wait situations). Use this analysis in the following situation, for example: You have been monitoring tasks with the task state Vwait in the Task Manager for a longer period.
Open the DBA Cockpit (transaction DBACOCKPIT) and choose 
Performance 
. Locks 
SQL Locks: Wait Situations .
For SAP NetWeaver 7.1, you can access this information through the Wait Situations user menu.
The system displays a list of all current wait situations for SQL locks in the database.
Exclusive locks mean that other users cannot access the locked entry. These locks can significantly interfere with the performance of the SAP system and the database system.
When you encounter SQL locks, be sure to find out which application is causing the locks. Using the Appl.ID in the wait situations display, you can identify the SAP work process that is holding the lock. You can use the Global Work Process Overview (transaction SM66) to get additional information, such as the user and the report. More information can also be found via bottleneck analysis.
You can also use options provided in the Database Console for further analysis.
Concepts of the Database System, SQL Locks