Hello Friends

I have certain queries regarding the Crawl Stats of google webmaster:

1. What is the relationship between 'Kilobytes downloaded per day' and 'Time spent downloading a page (in milliseconds)'. Is it an inverse relationship or a directly propotional relationship, or there is just some vague co-relation between them?

2. Does a drop in 'Time spent downloading a page (in milliseconds)' curve indictaes that the server of the website is not able to handle high traffic?

Would appreciate any help on this matter.