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Showing posts from December, 2012

Using Firefox now, Google chrome trashing my disk :(

I stop using Firefox now, because Google chrome trashing my disk :(
(wake up disk too often in laptop mode)

To check what is using your disk:

stop rsyslog
echo 1 > /proc/sys/vm/block_dump
watch 'dmesg -T | tail -35 '

Misc:
You may want to add commit=600,relatime to / and /home to /etc/fstab
Read also: eatmydisk


Mysql on low memory system

This will reduce mysql memory usage on system with low memory, for example 256MB:

Edit /etc/mysql/my.cnf

[mysqld]
....

innodb=OFF
default-storage-engine=MyISAM
....

service mysql restart


Custom script: set cpu governor to powersave

Custom script to set cpu governor to powersave when using battery, and return to ondemand when plugged


cat /etc/pm/power.d/90khad
#!/bin/sh

batt() {

echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo powersave > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo powersave > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo powersave > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor

}

ac() {

echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo ondemand > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor

}

case $1 in
    true) batt ;;
    false) ac ;;
    *) exit $NA ;;
esac

exit 0


Daftar applet/indicator di ubuntu

Wah, banyak indicator yang keren2 di ubuntu, lihat di sini:

http://askubuntu.com/questions/30334/what-application-indicators-are-available

Yang gw install:

System Load Indicator (grafik cpu)DropboxHardware Sensors Indicator (untuk temperatur)


More laptop power saving, Ubuntu

First, make sure your chipset supports ALPM, my Asus K43SM.401 does

vi /etc/pm/config.d/sata_alpm

write this line:
SATA_ALPM_ENABLE=true

Try to plug and unplug your charger

To check:
cat /sys/class/scsi_host/host*/link_power_management_policy

it should read min_power when on battery power