Oh go crazy then
you are not probably not close to 2gb, just for reference I was unable to have 2 weeks of raw keep time but I have 300 devices and probably 450 graphs ~1200 probes. Search for vacuum in this forum. The database is easy to find in the dude folder. I vacuumed mine once and it went down by a bunch ~1.8 to 850ish. There are already a bunch of good posts about what is in the database. No one has taken it very far though. The data is compressed inside the tables so no one has done much other than vacuum or try to repair a broken record. No tools exist to extract a single graph or find/remove corrupt data or remove a single value that is erroneous from a table.
Although there is some code on this forum that will extract data from the web pages that the dude generates... I seem to remember something like that anyhow