Memory usage

[write2ashokkumar]

We have newly installed linux server with 12 GB of RAM.

Only mysql server in running with this linux box.

We are trying to set the more buffer for mysql, but mysql is not taking.

We have tried to fixed this issues, that time we have seen the memory usage of the linux.

Tasks: 279 total, 1 running, 278 sleeping, 0 stopped, 0 zombie
Cpu(s): 3.6%us, 0.2%sy, 0.0%ni, 92.7%id, 3.4%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 12293068k total, 12250064k used, 43004k free, 18012k buffers
Swap: 14352376k total, 216k used, 14352160k free, 8380644k cached


Here used size is around 11GB free only 40MB, we dont know why OS taking more memory. Only mysql is running in this server, which is taking 30% of RAM, remaining space using my OS.


How to check the process which is taking more memory?

How to optimize the linux OS?

Can you anybody help me?


Thanks.

Regards,
S.Ashokkumar.

[coopstah13]

linux memory managment is different from windows memory management pre-vista

it will use all available memory as disk cache and release it as real applications need it

what you are experiencing is normal, and not a problem

[pv2010]

I assume you got the above usage statistics using the top command.
The same command will give you a list of processes and percentage memory they are using.

[gumaheru]

Use the free command to get a more accurate account of memory that is free. Don't use top.