Migrating Java Applications to HP-UX

Figure 21 Lock Delay - Call Graph Tree

7. Look at lock delay at thread level instead of process level (Figure 22):

Select Scope->Thread (Change to thread scope)

Select Metrics->Threads/Locks->Lock Delay - Method Exclusive

Figure 22 Thread level Lock Delay - Method Exclusive

Reducing Lock Contention in Your Application

To reduce lock contention, there are several recommended options to try:

• Tune the thread count in the application (most likely reduce number of threads)

• Tune deployment of Java (see next section "Deployment of Java Instances and Processor

Usage")

• Make application modifications to reduce lock contention (break up locks or hold locks for

shorter time)

• Modify thread scheduling policy (see section “Other Factors”)