troubleshooting Question

Redhat Linux RHEL 5.1 shows less RAM memory than physically present

Avatar of sunhux
sunhux asked on
Unix OSLinuxLinux Distributions
16 Comments6 Solutions2095 ViewsLast Modified:

From /proc/meminfo  &  top & dmesg, our 32bit RHEL 5.1 (but 64-bit hardware)
showed only a total of 3GB RAM.

Physically 16GB RAM were inserted.

Q1:
Is top/dmesg/meminfo giving the right info or how to get
RHEL 5.1 to fully utilize the 16GB or what's missing?


Q2:
Is 32 or 64 bit RHEL 5.x better at utilizing memory?
The box hosts 7 Oracle instances

Q3:
Is there a lot of effort involved to upgrade from 32 bit
to 64 bit RHEL 5.1?  Do I need to take a backup followed
by restore or just install the 64-bit RHEL 5.1 over it &
all the apps will still be intact?

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