: Split 3.5M pages under different subdomains. Good idea? I have a website with 3.5M pages (one page for a product) but Google is only indexing about 1M pages according to google.com/webmasters

@Eichhorn148

Google is indexing only a portion of your pages because your site doesn't have enough reputation. Splitting your reputation between three subdomains isn't going to help. You will still only be able to get 1M pages indexed.

You need to increase the reputation of your site.

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@Deb1703797

If the subdomains run all on the same server, then its bad speed-wise. I tried it myself and noticed higher TTFB values when I ran them under webpagetest.org

Also, each new subdomain request is like trying to connect to a website.

For example, if your main page is at example.com and a user clicks on a link to your product page located at products.example.com then the user will have to wait for their computer to look up example.com then when the user clicks on the product page, there will be waiting time for products.example.com as well. This waiting time is the DNS lookup time.

If instead you had the same situation but the links are instead example.com and example.com/products, then one DNS lookup time will be eliminated since both of these URLs are on one domain and that domain is cached in the user's computer since example.com was accessed.

Therefore your idea could make things slower for the client which means your idea is not good, especially if you want to use hundreds of subdomains.

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