Whenever you make major changes to something about the website, it is natural you see significant changes in the amount of crawling the Google but does on the site. This is completely normal and expected.
The same is also true when you switch over your site to CDN. But if you remove the CDN or otherwise change it, you will also see the same kind of Google but collectivity on the site when that’s done.
John Mueller from Google confirmed this via twitter.
If you remove / change the CDN, it will affect crawling — that's expected.
— John ☆.o(≧▽≦)o.☆ (@JohnMu) August 22, 2018
The increase crawling activity is simply because Google is reindexing these pages with a CDN addition, removal or change. Site owners will also see the same kind of crawl activity when they do a site move or switch to HTTPS or make other major changes to the site.
That said, site owners should be concerned about an increase in crawling is if there is an issue with the increase crawling causing server issues, such as Google but crawling the site so hard it is taking down the server. While this is pretty unusual it can happen, especially if there’s something about the site that has created infinite URLs for example. So if you have made major changes to a site, expect increased crawl activity, but with no associated changes to a site, it can sometimes highlight issues Googlebot has come across, such as a million pages being crawled from a calendar on a site or parameters gone wild.
Latest posts by Jennifer Slegg (see all)
- Google Local Service Ads Display Pricing Estimates for Specific Locations - August 31, 2018
- Google Testing “Relevant History” Section in Mobile Search Results - August 31, 2018
- Google Converts PDFs, DOCs, XLS etc into HTML for Indexing - August 30, 2018
- Why Google Shows Featured Snippets With Images from Another Site - August 29, 2018
- How to Download Links Report in New Google Search Console - August 27, 2018