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CHAPTER 13
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FLWait: Number of times IQ had to wait for the lock on the free list
(repeated for the temp cache)
•
MemLks: Number of times IQ took the memory manager (heap) lock
•
MemWts: Number of times IQ had to wait for the memory manager
lock
•
displays information about processing threads
-threads
•
cpus: Number of CPUs on system
•
Limit: size of thread manager pool
•
NTeams: Number of thread teams currently in use
•
MaxTms: Largest number of teams that has ever been in use
•
NThrds: Current number of existing threads
•
Resrvd: Number of threads reserved for system (connection) use
•
Free: Number of threads available for assignment
•
Locks: Number of locks taken on the thread manager
•
Waits: Number of times IQ had to wait for the lock on the thread
manager
•
specifies the reporting interval in seconds. The default is every 60
-interval
seconds. The minimum is every 2 seconds. You can usually get useful
results by running the monitor at the default interval during a query or time
of day with performance problems.
•
Append to existing output file or truncate existing
-append | - truncate
output file, respectively. Truncate is the default.
Monitoring and Tuning Performance
471
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