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The global lock was removed in 2.2 https://blog.serverdensity.com/goodbye-global-lock-mongodb-2-0-vs-2-2/ https://blog.serverdensity.com/goodbye-global-lock-mo

• MichaelGG 13y ago
  That sorta makes it sound worse, honestly, if databases in MongoDB are anything like you'd use the word for in any other datastore. A global lock across all databases is mind-bogglingly confusing; what's one DB got to do with another? Couldn't you just work around that before by running a separate Mongo process per database? Saying it's now on the database still means any single-database app is globally locked. Or does using Mongo imply you're going to be making lots of databases so this actually means anything?
  • nasalgoat 13y ago
    That's what we do - dozens of databases, containing one collection. It's perverse.