mongodb/mongo-ruby-driver — pull request #371 by estolfo (2014-02-27 22:08:08+00:00)
Title: Use 4096 for capped collection size, the server rounds up to the nearest extent

Use 4096 for capped collection size instead of 100, since server rounds up to the nearest extent anyway. As of https://jira.mongodb.org/browse/SERVER-12794, the actual storage size is reported, so we can use and expect 4096.