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Database Administration
Reference : Database Startup Parameters : Alphabetical listing of database startup parameters : Semaphore Sets (-semsets)
 
Semaphore Sets (-semsets)
Operating system and syntax
UNIX
-semsets n
Use with
Maximum value
Minimum value
Single-user default
Multi-user default
DBS
Maximum Number of Users + 1
1
–
3
n
An integer specifying the number of semaphore sets available to the broker.
Use Semaphore Sets (-semsets) to change the number of semaphore sets available to the broker. When more than 1,000 users connect to a single database, there might be high contention for the semaphore set. If there is a lot of semaphore contention on a system, using multiple semaphore sets helps improve performance on high user counts.