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| Kernel Parameter | Description | Recommended Value |
|---|---|---|
| semmns | The maximum number semaphores in the system, and 16 bytes of kernel memory are allocated | 8192 |
| semmni | The maximum number of semaphore sets can be set within 65535, and 84 bytes of kernel memory is allocated per set. | 5092 |
| semmsl | The maximum number of semaphores in a set of semaphores and must be logically equal to or less than semmns. If set too large, several semaphore IDs can monopolize the entire system semaphore. | 2000 |
| semmap | Semaphore space obtained by semget call | 5024 |
| semmnu | The maximum number of undo structures in the system | 1024 |
| semopm | The maximum number of operations processed by semi semop system call | 512 |
| semume | The maximum number of undo entries per process | 512 |
| semvmx | Limits the maximum value of one semaphore and does not specify a value greater than 32767 | 32767 |
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