My APC cache has a 100% fragmentation. I'm not quite sure I understand what is going on here. For testing I jacked the available memory up to 512. After a day the total available free memory shows 73% but I still have 100% fragmentation. Would you gurus please look at my settings and offer your advice? Oh, I have read people suggest that I disable apc.stat when possible but when I do the site crashes. I am using the Pressflow build of Drupal 6 with the cacherouter module installed. Edit: (added screenshot) http://i.imgur.com/DqZEX.png