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Wall PapersWhen i try to check the free memory by using free command, i find the output very misleading. so i tried to cat /proc/meminfo .. which is driving me mad. Let me explain the situation i have, I have a 12G RAM server. using ps aux or top i find that the only process that is really eating up memory consumes around 60% of the RAM.. cool.. that's nice. But when i use free -m i get:
total used free shared buffers cached
Mem: 12013 11992 20 0 5 105
-/+ buffers/cache: 11881 132
Swap: 8191 16 8175
and /proc/meminfo:
MemTotal: 12301940 kB MemFree: 21636 kB Buffers: 5896 kB Cached: 108120 kB SwapCached: 6140 kB Active: 7294524 kB Inactive: 9068 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 12301940 kB LowFree: 21636 kB SwapTotal: 8388576 kB SwapFree: 8372132 kB Dirty: 124 kB Writeback: 0 kB Mapped: 7282484 kB Slab: 117732 kB CommitLimit: 14539544 kB Committed_AS: 7723424 kB PageTables: 18192 kB VmallocTotal: 536870911 kB VmallocUsed: 266880 kB VmallocChunk: 536603755 kB HugePages_Total: 0 HugePages_Free: 0 Hugepagesize: 2048 kB
can anyone help me with this? i wanna know howto read these numbers. thanks
I don't know why I have
I don't know why I have the feeling it's either Java or Oracle related.
WWW: The place for organized randoms!
it's /dev/shm
ok this is what i was thinking too, untill it started swapping and server started to get really slow. Anyway i figured out that all the memory was eaten by /dev/shm which is 5.9G , this is really nonsense... i dunno exactly what's /dev/shm is doing, but i think it's about shared memory between programs, and i got only 1 important process in this server. I'll try to read more about it.
Ahmed D. El-Mekkawy
First don't panic when you
First don't panic when you read the second line of $free -m output ;-), when there is a free ram space that programs don't use Linux will fill this space with buffers/cash for faster reading in the future,ignore this line.so lets look to the third one which reports 11881 MB of 12013 MB being used and 132 MB free.the final one tell us the swap space that we used.
/proc/meminfo provide the same informations and more.
Update : to know howto read /proc/meminfo check out for help.
But I'm curious. what is that process which eat 60% of 12GB RAM?!!