BigAdmins

Solaris 10 has introduced a lots of new features and one of them is to tune the kernel without rebooting the system. So that you can modify the kernel in a live production system. Many kernel parameters have been replaced by so called resource controls in Solaris 10. It is possible to change resource controls using the prctl command. All shared memory and semaphore settings are now handled via resource controls, so any entries regarding shared memory or semaphores (shm & sem) in /etc/system will be ignored. Before going into details let us check what is semaphore.

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All Sun Servers and workstations have resident boot PROM firmware (called OBP) that provides basic hardware testing and initialization prior to booting. The boot PROM also enables you to boot from a wide range of devices. The boot PROM firmware controls the operation of the system before the OS has been booted and the kernel is available.Before updating we should know what is the existing OBP revision. Read more…