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Import tested with the [https://mhss.sk.ca/the-grandma-genealogical-database GRANDMA Mennonite databaseGRanDMA (the '''G'''enealogical '''R'''egistry and '''D'''atabase of '''M'''ennonite '''A'''ncestry)] of 1.4 million people. by user on reddit!! https://www.reddit.com/r/gramps/comments/dzevcl/database_size_limit_for_gramps/fb6hdbj/ The [[https://www.grandmaonline.org/gmol-7/gwHelp/petersHistory.asp history of GRanDMA]] by Alan F. Peters to the early 1990's, which pre-dates the GRAMPS project and acronym. The California Mennonite Historical Society partnered with John Steed and his “Brothers Keeper” software package since it had the capacity for 1 million people (raised to 10 million at the committee's request) with customizable searching.

It's been a few weeks since I asked whether anyone had attempted to use GRAMPS with the GRANDMA GRanDMA Mennonite database of 1.4 million people.

In the meantime, I had ordered the GRANDMA GRanDMA database, but the organization selling it somehow gave me a bad download code and I couldn't reach them for several days (holiday and weekend). It was more than a week later before I was able to try loading the GRANDMA GRanDMA database into GRAMPS.

It took about three days to load the GRANDMA GRanDMA database into GRAMPS, after giving GRAMPS a realtime priority in Windows. Setting GRAMPS to realtime sped up the loading considerably. My computer is rather fast compared to many, so anyone who wants to do the same thing should consider that it could take a week or longer to load up a huge database like GRANDMAGRanDMA.

At this point I have the GRANDMA GRanDMA database loaded into GRAMPS and running okay. It's really slow to switch to various functions, but it works okay once you get to each part of the GRAMPS program. One difficulty I ran into was scrolling through the 1.4 million records. It moves through the records quickly, but there are so many that you can't just use your cursor to pull to the surname you want to explore. Instead, I have to move the slider to a surname as close as possible, then scroll repeatedly until I find it. That can be 10-20 spins of the mouse wheel, so the process can be exhausting when you are looking for many different names.