Hugepages are Not used by Database Buffer Cache
(Doc ID 829850.1)
Last updated on JANUARY 30, 2022
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Following the steps in <Note 748637.1> you have configured your Linux for Very Large Memory with HugePages.
As described on <Note 749851.1> you have MEMORY_TARGET & MEMORY_MAX_TARGET initialization parameters disabled as the use of 11g Automatic Memory Management (AMM) is incompatible with HugePages.
Your SGA size is less then the size of the HugePages_Total (HugePages_Total*Hugepagesize)
But despite this the HugePages are not used by the database buffer cache.
Here I would like to show you an example of a possible scenario:
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