By adding the noatime option to your main partition within your fstab can significantly increase your IO and overall server/drive performance. Please be sure to have your data backed up. This shouldn't cause any data loss, but better be safe than sorry.
Code:
1. Open up /etc/fstab in your favorite browser.
2. Add the noatime option to the line you you want.
Example:
/dev/sda7 /chroot ext2 defaults,noatime 1 2
3. Save the file and close.
4. You now must remount that partition. No reboot necessary. Just run this command:
mount -oremount /chroot (replace chroot with the partition you added noatime to)
That's it!