My Oracle Support Banner

Database is not starting up with ORA-27102 after enabling hugepages (Doc ID 1990322.1)

Last updated on FEBRUARY 19, 2025

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 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 Backup Service - Version N/A and later
Information in this document applies to any platform.Symptoms


Hugespages is set as per recommended by hugepages_settings.sh in Doc ID 401749.1, also Kernel parameters "memlock" and "shmmax" are set properly. 

Follow Doc ID 361468.1 for implementing hugepages. 

Database failed to start due to following error after enabling hugepages :

SQL> startup nomount
ORA-27102: out of memory
Linux-x86_64 Error: 28: No space left on device

 

Command "free" shows enough free space, also SWAP is configured with enough size and not full.


The Database can be started after setting USE_LARGE_PAGES=false with same SGA size (this case - 25g), however The Database can't be started with hugepages

Changes

Enabling hugepages

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document
Symptoms
Changes
Cause
Solution
References


My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.