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IBM AIX on POWER Systems (64-bit) version 7.2 Large Pages Information in Alert Log File is Incorrect (Doc ID 3063550.1)

Last updated on DECEMBER 13, 2024

Applies to:

Oracle Database - Enterprise Edition - Version 19.24.0.0.0 and later
Information in this document applies to any platform.

Symptoms

Alert log file shows AIX Large Pages configuration does not match OS configuration.

It shows 16M and 16G Large Pages that are not configured at the OS level.

 

Starting ORACLE instance (normal)

************************************************************
Instance SGA_TARGET = 204800 MB and SGA_MAX_SIZE = 204800 MB
************************************************************

**********************************************************************

Dump of system resources acquired for SHARED GLOBAL AREA (SGA)


Available system pagesizes:
 4K, 64K, 16M, 16G

Supported system pagesize(s):

 PAGESIZE  AVAILABLE_PAGES  EXPECTED_PAGES  ALLOCATED_PAGES  ERROR(s)

       4K       Configured               0                0        NONE

      64K       Configured               1                1        NONE

      16M       Configured             513              513        NONE  <---

      16G       Configured              12               12        NONE    <---

**********************************************************************


System parameters with non-default values:

 sga_max_size             = 200G

 sga_target               = 200G

 

AIX OS configuration shows only 64 KB pages:

    PageSize                Inuse        Pin       Pgsp    Virtual
    s    4 KB                3612          4          0       3562
    m   64 KB             3150527        834         64    3150915


 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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