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Memory Fragmentation and buddyinfo

H. Walls

2008-04-16


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Here's an example of output from my /proc/buddyinfo:
Node 0, zone    DMA   66   80   25   22    6    2    0
0    2    1    1
Node 0, zone  Normal  9374  2257  1609   340   12    0    0
1    0    0    1
Node 0, zone HighMem    0    4    8   12    4    5    1
0    0    0    0

I understand the algorithm but I can't seem to find a definitive explanation
on how memory fragmentation can affect my server, what values in buddyinfo I
should be concerned about, or what can be done if I do experience excessive
memory fragmentation. Thanks.
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