Originally Posted by wynode
Ok so before I started using the on-the-fly watermark the URL in my logs was /gallery/showgallery.php and that was around 1.13% of my bandwidth.
The next month (when I started using the watermark, the usage went up to around 5.12% of my bandwidth and the URL in the logs is /gallery/watermark.php
No. Before you started using "on the fly watermarks" the URL in your logs would have been the URL to each individual image file. So a seperate record for each file. Now that you use the watermark.php it shows up in your logs instead of each individual image file.
Sure serving up your watermark image each time an image file is displayed will increase your bandwidth a bit, I would doubt that your total monthly bandwidth has gone up much. It's just now represented by just one file "watermark.php" instead of all the individual image files in your gallery.
watermark.php will use up more server resources than just displaying the plain image file would, but it shouldn't use up any significant amount of extra bandwidth.