Installation issues

When trying to follow the steps in "help/apc/README.txt" step 2 results in 100% fragmentation and slower page loads.

I am currently developing my website on my Ubuntu 11.10 home computer so used synaptic to install APC. I manually installed the Drupal Alternative PHP Cache Module.

I have added the following to my php.ini :

extension=apc.so
apc.enabled = 1
apc.shm_size = 80

I needed to increase the apc.shm_size to 80 in order to eliminate my 1st encounter with 100% fragmentation and a very bad hit/miss ratio. I have Commerce Kickstart installed so there's a bunch of enabled modules.

I have also applied the following to my kernal :
sudo sysctl -w kernel.shmmax=84000000

The way I test to see how things are working is restart apache2, go to my site and click around virtually every page like a new visitor may do, then go look at mydrupalsite/apc.php?SCOPE=A&SORT1=H&SORT2=D&COUNT=20&OB=1 to view the statistics.

Any help getting this to work would be greatly appreciated. Thanks in advance for your time!

Drupal skill level = beginner ;-)