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.

To change this parameter while the database is running, use PROMON or the _DbParams VST.

You can use this parameter to support continuous operation of the database. For more information, see Change database parameters while the database is running.