Hi list,
I need the esteemed people's second opinion to a recommendation I gave a
client.
The setup:
Machine with 16GB ram and a bit of swap, running 32bit gentoo with (as
far as I know) 3:1 memory split.
The symptoms:
Every so often the oom-killer kicks in, for no apparent reason. The
processes it kills appear to be randomly chosen. Monitoring was not
turned on, but there is no reason to suspect the 16GB+swap were nowhere
near exhausted at the time.
My suggested diagnosis and recommendations:
The kernel only has 1GB with which to work, which causes it to run out
of memory for managing the page tables. I recommended they:
- As a first stage, disable the swap.
- As a second stage - switch to a 64bit kernel
My question is whether my diagnosis makes any sense, and if not, whether
anyone has any better idea as to what might be the problem.
Also, is there any way to monitor how much kernel memory is in use? It
seems that monitoring the "LowTotal" and "LowFree" values in
/proc/meminfo may be what I'm looking for, but I'm not sure I'm reading
the docs proprely.
Shachar
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