G.6 Operating System-Level Tuning

The operating system level performance tuning is related to Semaphores and shared memory settings.

• Semaphores: Linux Semaphore settings must be set to optimal under the SEMMSL configuration value.
• Shared Memory: ALM Engine consumes shared memory during any ALM process execution hence it is crucial to check the availability of current shared memory and tune it accordingly. Shared memory kernel parameters must be set to optimal. The configuration file (ofsrm.ini).

Sometimes users may observe an out of shared memory error reported in ALM Engine log files during process execution. In such cases, one needs to verify and update shared memory size by updating the SharedMemory parameter that can be found in the ofsrm.ini file which is located in $FIC_DB_HOME/conf. The default value of this parameter is 16500 (KB).