require "mongo" client1 = Mongo::Client.new( 'mongodb://127.0.0.1:27017/' ) client2 = Mongo::Client.new( 'mongodb://127.0.0.1:27017/' ) client3 = Mongo::Client.new( 'mongodb://127.0.0.1:27017/' ) client4 = Mongo::Client.new( 'mongodb://127.0.0.1:27017/' ) Mongo::Logger.logger.level = Logger::WARN for x in 0..100 thr = Thread.new { # sleep 1 before = Time.now client1.use( "admin" ).command(:listDatabases => 1) after= Time.now p "took: " + (after-before).to_s } thr1 = Thread.new { for i in 0..100 name = "abcd" + ((x*100)+i).to_s; client2.use(name)[:foo].indexes.create_one({ :x => 1}) client2.use(name)[:foo].insert_one({ :x => 1}) client2.use(name)[:baz].indexes.create_one({ :x => 1}) client2.use(name)[:bar].insert_one({ :x => 1}) end } thr2 = Thread.new { for i in 0..100 name = "abcd" + ((x*100)+i).to_s; client3.use(name)[:bar].indexes.create_one({ :x => 1}) client3.use(name)[:bar].insert_one({ :x => 1}) client3.use(name)[:qux].indexes.create_one({ :x => 1}) client3.use(name)[:qux].insert_one({ :x => 1}) end } thr3 = Thread.new { for i in 0..100 name = "abcd" + ((x*100)+i).to_s; client4.use(name)[:alpha].indexes.create_one({ :x => 1}) client4.use(name)[:alpha].insert_one({ :x => 1}) client4.use(name)[:beta].indexes.create_one({ :x => 1}) client4.use(name)[:beta].insert_one({ :x => 1}) end } thr1.join thr2.join thr3.join thr4 = Thread.new { for i in 0..100 name = "abcd" + ((x*100)+i).to_s; client2.use(name)[:foo].drop client3.use(name)[:baz].drop client4.use(name)[:beta].drop end } thr4.join sleep 20 thr.join() end