Oracle Linux 5 64-bit Cannot Detect More Than 32 GB of Physical RAM (Doc ID 860319.1)

Last updated on MARCH 24, 2016

Applies to:

Linux OS - Version 2.6.18-8 to 2.6.18-128
Linux x86-64
Linux x86-64

Symptoms

Oracle Linux 5 64-bit (x86_64 architecture) detects only 32 GB of RAM on a x86_64 system with more than 32 GB of of RAM installed (e.g. 64 GB). i.e.:

# cat /proc/meminfo
MemTotal:     33554432 kB
MemFree:        330292 kB
Buffers:        340272 kB
Cached:       28043320 kB
SwapCached:     119428 kB
...
#

Changes

One of and not limited to:

Cause

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