Database Install/Upgrade/Opatch (MOSC)

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How to Set the SHMMAX and SHMALL with 24GB RAM

edited Jul 13, 2009 2:56AM in Database Install/Upgrade/Opatch (MOSC) 2 commentsAnswered
I'm moving our 10g database from a 32-bit to a 64-bit box. The new box has 24GB of RAM with RHEL4 as the OS. My question is how do I configure the shmmax and shmall if SGA will be 20GB. By the way, the new box will be solely used by one database. Based on the installation documentation, to compute  the shmmax get whichever is lower between 4GB - 1 byte and half the size of the physical memory. And shmall has a formula of SGA / page_size. Using the formulas above would this mean my kernel settings should be

shmmax = 4GB - 1 byte (max size according to the documentation)

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