Storage Management (ASM ACFS DNFS ODM) (MOSC)

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ASM Memory Management with HugePages

edited Sep 3, 2013 12:47PM in Storage Management (ASM ACFS DNFS ODM) (MOSC) 8 commentsAnswered ✓
Hugepages Not used when ASM is used (Doc ID 1457842.1).

Modified: Aug 14, 2013

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3

Symptoms

Followed Note 361468.1 - HugePages on Oracle LInux 64-bit but Oracle is still not using hugepages.

Cause

The RDBMS not using huge pages was because the ASM home was still using AMM. This is the default for an ASM instance. Please refer to Note: 749851.1 - HugePages and Oracle Database 11g Automatic Memory Management (AMM) on Linux.

Solution

Make sure the ASM home not using AMM.

The ORACLE Doc ID 1457842.1 says that the RDBMS will not use HugePages if the ASM instance (ASM home) is using AMM. Meaning that if you want your RDBMS (using ASM for storage) to use hugepages then the ASM must be either ASMM or manually managed memory parameters.

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