I run a cron job to update a graph which charts hits to my website. I just do this by running throught the apache log. The file tends to get quite big. Right now I generate the entire graph every time I run the script. This tends to eat up quite a few CPU cycles. What I'd rather do is just jump to the point I had last read the file up to and then just parse the new accesses. Any suggestions for how I'd do this?