memory usage

Hi All,
I have setup slave db. The machine configuration details of this slave is
same as master.

S=redhat
8 cpu
16GB RAM

key_buffer_size=3000M


But when i do top, in the master db


Cpu(s): 0.5%us, 0.3%sy, 0.0%ni, 87.2%id, 11.9%wa, 0.0%hi, 0.1%si,
0.0%st
Mem: 16436956k total, 16350252k used, 86704k free, 9188k buffers
Swap: 16386292k total, 37232k used, 16349060k free, 2358944k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ CMMAND
28706 mysql 15 0 14.3g 13g 4688 S 6 84.1 540:21.55 mysqld

slave db

Cpu(s): 0.7%us, 0.2%sy, 0.0%ni, 87.3%id, 11.8%wa, 0.0%hi, 0.0%si,
0.0%st
Mem: 16436956k total, 16351536k used, 85420k free, 16400k buffers
Swap: 16386292k total, 164k used, 16386128k free, 4289520k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ CMMAND
14042 mysql 18 0 14.0g 11g 4652 S 7 72.5 265:08.62 mysqld
435 root 10 -5 0 0 0 S 0 0.0 3:29.07 kswapd0



As you can see the RES in master is 13g, but on slave its 11G any specific
reason for this. This is causing some of the sql's on the slave to be
slower than master for the same select statement on both master and slave.



regards

anandkl