Kanwar Ranbir Sandhu wrote:
Hi Everyone,
My server is only seeing 4.8 GB out of 6 GB available. I don't know
why.
I have a CentOS 4.4 x86_64 server running on a Tyan s2895 with 6 GB of
RAM (two 1 GB sticks and 2 2 GB sticks). I upgraded the RAM, powered up
the server, and when CentOS was finished booting, checked the available
RAM with free. This is what it's reporting:
total used free shared
buffers cached
Mem: 4809064 4769492 39572 0 197156
3127704
-/+ buffers/cache: 1444632 3364432
Swap: 2064376 176 2064200
The BIOS sees all of the RAM. In fact, it looks to me like the kernel
knows 6 GB is available. But, it is only using 4.8 GB because I see
this in dmesg:
Memory: 4808464k/6291456k available (2106k kernel code, 0k reserved,
1299k data, 196k init)
What happened to the other 1 GB+ of RAM?
It's probably a memory hole mapping setting ... you probably need to
enable it - have a look under 'Advanced Hammer Configuration' (or
similar) in the BIOS
James Pearson
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