Semaphores

Note: Not all parameters are configurable in every operating release.

These definitions apply to semaphores:

Parameter	Description
sema	This value must be 1. System-V style message queues are valid.
semmni/project.max-sem-ids	The value of semmni (project.max-sem-ids) represents the maximum number of semaphore identifiers that can exist throughout the system. For JD Edwards EnterpriseOne, two identifiers exist for each instance of JD Edwards EnterpriseOne, so the default value supplied with the HP-UX and Solaris systems should suffice.
semmap	The value of semmap represents the number of entries in the map of free semaphores. The default value of semmni + 2 should suffice. If you decrease the value of semmap, attempts to create a semaphore set, which occurs during JDEIPC initialization, might fail. Note: This parameter is not used in Solaris.
semmns	The value of semmns represents the maximum number of semaphores that can exist throughout the system. Each instance of JD Edwards EnterpriseOne allocates 1000 semaphores by default. However, you can customize this value in the JDE.INI file. In the [JDEIPC] section, modify the parameter maxNumberOfSemaphores to customize the number of semaphores that an instance of JD Edwards EnterpriseOne allocates. For all releases of JD Edwards EnterpriseOne, the JD Edwards EnterpriseOne requirement is in addition to the requirements of other software. A good starting point for a typical JD Edwards EnterpriseOne installation (single instance) with Oracle should be 2000. Note: This parameter was removed in Solaris 10.
semmnu	The value of semmnu represents the maximum number of semaphore undo structures for the entire system. Effectively, this value is the maximum number of semaphores that the system can lock at the same time. For JD Edwards EnterpriseOne, enable one for each JD Edwards EnterpriseOne process that can exist for all installations of JD Edwards EnterpriseOne on the system. Use these equation to determine this value: 1 + jdenet_n + jdenet_k + maximum number of runbatch processes + maximum number of runprint processes + maximum number of runube processes Note: This equation is similar to the equation used to calculate the value for msgmni. If you will be running a large number of batch queues or print jobs, you might need to increase the value of this parameter. The number of outstanding print requests at a given time, whether printing or waiting for a printer, determines the number of jdeprint processes. A reasonable estimate for the upper limit of this value is 10. However, this estimate is application-dependent. For example, a large warehouse that constantly prints pick slips might have more requests. The number of batch processes that run directly on the server, not from a client, determine the number of runube processes. This value depends on the use of the system. Theoretically, this value has no limit. Note: This parameter was removed in Solaris 10.
semume	The value of semume represents the maximum number of semaphore undo structures per process. Effectively, this value is the maximum number of semaphores that a given process can lock at the same time. JD Edwards EnterpriseOne requires a minimum value of 4 for semume. This minimum value is not in addition to the system default and the requirements of other software. This value is a simple minimum. The default value provided with the system should suffice. Note: This parameter was removed in Solaris 10.
semmsl/process.max-sem-nsem	The value for semmsl (process.max-sem-nsem), which applies to Solaris and newer versions of HP-UX, represents the maximum number of semaphores per unique identifier. For JD Edwards EnterpriseOne, this must be set equal to or higher than the maxNumberOfSemaphores setting in the JDE.INI file. For the default installation, you should set this parameter to 1000.