Subsystem and Transaction Monitoring and Tuning with DB2 11 for z/OS

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IRLM, locking, and latching

Locks and latches are used respectively by the application and by DB2 to serialize events and maintain data integrity. The IRLM subsystem manages DB2 locks. You can monitor the use of locks and latches to improve concurrency and prevent problems such as contention, suspensions, timeouts, or deadlocks.

This chapter contains the following topics:

•DB2 and the internal resource lock manager (IRLM)

•DSNZPARMs related to locking

•Lock avoidance

•Data sharing locking

•Internal DB2 latch contention

8.1 DB2 and the internal ...

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