On Google Webmaster Help Forum, one webmaster asked for help regarding how GoogleBot crawls his sites. He said he himself can’t adjust the googlebot crawl rate for his domains.
John Mueller answered all his queries and provide him a link to contact the crawling team.
John said “they can help you better with all these requests.”
So if someone want particular help with Google crawling, then they can request the Googlebot team through the form.
Though, in general, one should make sure that their server can handle the crawl from Google.
You can read the whole discussion at Google Webmaster Help.