We Cut a 190 GB Production Database to 45 GB in One Night. Here's What We Learned. Our flagship internal application had a storage problem. Twelve years of accumulated project data had pushed the production database past 190 GB, and we were about to migrate it to a managed cloud instance where every gigabyte carries a monthly bill. The mandate was simple: get it under control before the migration. The execution was less simple. Here's how it went, and the six things I'd tell anyone att...