Lock Manager
The lock manager is a generic service of the SAP HANA Data Warehousing Foundation core component. If a process in a Data Warehousing Foundation application has implemented the lock manager service, while reading or writing an entity by the process, locking prevents other processes from accessing this entity (shared or exclusive lock).
Locking is used for the following processes:
|
Tool |
Process |
Entitiy |
Description |
|---|---|---|---|
|
Data Distribution Optimizer |
Plan Generation |
Configuration |
Shared lock: Prevents users from deleting the configuration that is used for plan generation. |
You can open the lock manager under 
More 
Lock Manager
in the header area of the Data Distribution Optimizer screen. Here, you
see a list of the current locks.
In the event of a server crash, Data Distribution Optimizer administrators (users with role sap.hdm.ddo.roles::Administrator) can remove the locks manually with the Remove selected Lock button.