Free , memory usage

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originally posted by feiwu@Apr 12 2006, 11:03 AM

dear everyone.

my platform is nios2+uclinux2.6! and i hae a 16mbytes sdram chip on board,

but when i use "free" command to dispaly the memeory status!, list information is diaolayed.

total used free shared buffers

mem 14616 8836 5780 0 0

total = used+free ,but not 16 mbytes, i can't understand free command well.

who can tell me why?

best regards,

fei wu

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# MemTotal: Total usable ram (i.e. physical ram minus a few reserved bits and the kernel binary code)# MemFree: Is sum of LowFree+HighFree (overall stat)# MemShared: 0; is here for compat reasons but always zero.# Buffers: Memory in buffer cache. mostly useless as metric nowadays# Cached: Memory in the pagecache (diskcache) minus SwapCache

read "man free" , "man proc" .

try some search google, "/proc/meminfo", and you can learn more.