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14.2. Usage of Big Pages and Huge Pages in Oracle 9i and 10g
Big pages are supported implicitly in Red Hat Enterprise Linux 2.1. But Huge Pages in Red Hat Enterprise Linux 3, 4 and 5 need to be requested explicitly by the application by using the
SHM_HUGETLB flag when invoking the shmget() system call. This ensures that shared memory segments are allocated out of the Huge Pages pool. This is done automatically in Oracle 10g and 9i R2 (9.2.0.6) but earlier Oracle 9i R2 versions require a patch, see Metalink Note:262004.1.
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