SOLUTION: Ubuntu 12.10 slow performance

If you experience slow disk performance in Ubuntu 12.10, disable irqbalance:

1. Edit /etc/default/irqbalance
2. Set ENABLED to 0
3. Reboot

Before:

Code:

egor@hacoc-bulk:~$ sudo hdparm -tT /dev/sda

/dev/sda:
Timing cached reads: 22018 MB in 2.00 seconds = 11018.99 MB/sec
Timing buffered disk reads: 184 MB in 3.18 seconds = 57.92 MB/sec

After:

Code:

egor@hacoc-bulk:~$ sudo hdparm -tT /dev/sda

/dev/sda:
Timing cached reads: 22340 MB in 2.00 seconds = 11180.13 MB/sec
Timing buffered disk reads: 1054 MB in 3.01 seconds = 350.70 MB/sec

 

This may fix a problem with disk performance, but it does nothing for the major and very bad performance of the Ubuntu 12.10 desktop.