Using Tuned to tune CentOS 6 System

Tuned is a Dynamic Adaptive Tuning System Daemon. According to Manual Page

tuned is a dynamic adaptive system tuning daemon that tunes system settings dynamically depending on usage. For each hardware subsystem a specific monitoring plugin collects data periodically. This information is then used by tuning plugins to change system settings to lower or higher power saving modes in order to adapt to the current usage. Currently monitoring and tuning plugins for CPU, ethernet network and ATA harddisk devices are implemented.

Using Tuned

1. Installing tuned

# yum install tuned

2. To view a list of available tuning profiles

 [root@myCentOS ~]# tuned-adm list
Available profiles:
- laptop-ac-powersave
- server-powersave
- laptop-battery-powersave
- desktop-powersave
- virtual-host
- virtual-guest
- enterprise-storage
- throughput-performance
- latency-performance
- spindown-disk
- default

3. Tuning to a specific profile

# tuned-adm profile latency-performance
Switching to profile 'latency-performance'
Applying deadline elevator: dm-0 dm-1 dm-2 sda             [  OK  ]
Applying ktune sysctl settings:
/etc/ktune.d/tunedadm.conf:                                [  OK  ]
Calling '/etc/ktune.d/tunedadm.sh start':                  [  OK  ]
Applying sysctl settings from /etc/sysctl.conf
Starting tuned:                                            [  OK  ]

4. Checking current tuned profile used and its status

# tuned-adm active
Current active profile: latency-performance
Service tuned: enabled, running
Service ktune: enabled, running

5. Turning off the tuned daemon

# tuned-adm off

References:

1. Tuning Your System With Tuned (http://servicesblog.redhat.com)