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Continue to ChatQuery : How to tell search engines to lower the robots.txt scanning rate on obsolete subdomains? After putting my site into one domain instead of multiple subdomains, I checked my logs and noticed that https://vmapp.org/query/126662/How-To-Tell-Search-Engines-To-Lower-The-Robots-Txt-Scanning-Rate-On-Obsolete-Subdomains-After-Putting-My-Site-Into-One-Domain-Instead-Of-Multiple-Subdomains-I-Checked-My-Logs-And-Noticed-That/