The kernel parameter sem consists of four tokens, SEMMSL, SEMMNS, SEMOPM, and SEMMNI. SEMMNS is the result of SEMMSL multiplied by SEMMNI. The database manager requires that the number of arrays (SEMMNI) be increased as necessary. … The MSGMNI parameter affects the number of agents that can be started.

What is the use of kernel parameters in Linux?

This blog will explain you the purpose of Kernel parameters we set when installing database software and its side effects when not set correctly. It will help you to debug when you tune the performance at the OS level.

What is kernel semaphore?

A semaphore is a value in a designated place in operating system (or kernel) storage that each process can check and then change. Depending on the value that is found, the process can use the resource or will find that it is already in use and must wait for some period before trying again.