i have a big doubt. we have both random & related wallpapers modules. which one depends more on CPU?. if we have 10k page views. is it suggestible to use random wallpapers.
if we set RAND() limit to 6 , does it mean it makes 6 requests for 6 wallpapers?.
please clarify me. as i am using shared servers i have to optimize my site as best as possible.