The SAP Lock Concept (BC-CST-EQ)
SAP Lock Concept
Relationship Between SAP Locks and Database Locks
Enqueue Server
Lock Owners
_SCOPE Parameters
Lock Table
Collision Check of Locks
Cumulating Locks
Optimistic Locks
How Optimistic Locks Work
Optimistic Lock Conflicts
Programming with Optimistic Locks
Example: Infinite Transaction with Update
Frequently Asked Questions: Lock Concept
Standalone Enqueue Server
High Availability with the Standalone Enqueue Server
Replication and Failover
Polling Concept
Working with the Backup File
Installing the Standalone Enqueue Server
Setting Up the Replication Server
Replication Server: Check Installation
Check Status
Monitoring the Lock Table at Failover
Importing Patches
Monitoring the Standalone Enqueue Server
Monitoring Replication Servers
Profile Parameter Settings for the Standalone Enqueue Server
Profile Parameters for the Enqueue Clients
Profile Parameters for the Standalone Enqueue Server
Profile Parameters for the Enqueue Replication Server
Trace Files
Important Profile Parameters for the Lock Concept
Managing Lock Entries
Selecting and Displaying Lock Entries
Deleting Lock Entries
Testing for Locking Problems
Displaying Lock Statistics
Subsequent Analysis of Lock Table Overflows
Analyzing and Solving Problems