Thanks, seoskunk. Hopefully, your suggestion is correct.
Going https ain't as easy as is repeatedly suggested, unless you have done it a bunch of times. But for me, a first-timer, with a 14-year-old site, it has been a living nightmare of 10 hours a day, 6 days a week, for months. So much junk had accumulated, things like a single period with an http link, stuff like that. About 69% of pages converted now, still waiting for the rest. I hope this aggressive crawling activity is indicative of an upcoming jump forward. .
When I moved my personal site to HTTPS, Google crawled it exactly as if it were a new site. That is, it didn't just follow redirects as and when it met them in the course of ordinary requests; once it had discovered the “new” front page, it did a systematic spidering of the entire site. So for a short time you will see a real spike in Googlebot requests.
You may also see a doubling in requests for the front page, as it continues month after month confirming that everything is getting redirected to HTTPS.
That was it. I went from 69% to 90% HTTPS indexed this morning, in my GSC, under Crawl - Sitemaps - Indexed. In GSC, under Google Index - Index Status, it hasn't changed yet, but I expect it will shortly.
So, just a few days, AFTER the deep crawl, AFTER I got my redirection correct. I hope for smooth sailing, going forward. Now, I can finally go back to creating content. .
This morning, I went to 94% HTTPS. So, yes, the DEEP crawl seems to be indicative of imminent further HTTPS indexing. A weight off my shoulders. PLEASE, check that you are redirecting properly, or it will take MONTHS to get HTTPS indexed. Cheers. .
I just took a closer look at GSC index data for my personal site, which went https in May because the browser kept yapping about piwik login. It's easy to check, as it's got a whopping total of something like 20 public pages. Interestingly but not especially surprisingly, the http and https charts aren't parallel. The https side leapt straight from 0 to 16 between one week and the next, while http clambered slowly and hiccupily downward over the course of 2-3 months. Since late July, they have consistently claimed to have three http pages indexed, dropping down to 2 at one point and then climbing back up again. I've got a nasty feeling this is a reference to my boilerplate pages--contact, legal and so on--which are not supposed to be crawled at all. (This is one reason I eventually exempted robots.txt from the https redirect.)