memory usage on Scyld slave nodes (fwd)
niles at scyld.com
Fri Feb 16 17:48:41 PST 2001
> It works fine, but when I use BeoStatus to look at the slaves it
> shows that the slaves all have about 400MB of their memory taken up.
> Anyone know what is eating up the RAM on those slaves? Each node
> has a total of 512MB of RAM. Why is beowulf eating up so much of
> it? Thanks.
I'm adding up all the memory that's in use on the entire machine, include
buffer cache for the filesystem. Linux tries to use any spare memory up
to about 90% of available as a cache of the filesystem.
I realize that this make that value in beostatus pretty much
worthless. It's also been pointed out that it's also the more
expensive for the kernel to compute. I believe "top" actually walks
though the proc table and adds up all the memory to get it's value,
but that also seems a bit expensive to me.
So short answer, it's not a problem, it's just not a real useful number
and I'll still deciding how to make it better.
Scyld Computing Corporation.
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