System Collections

**Table 1** Collections of version 4.0
System Collection	Description
admin.system.roles	Stores user-defined roles created and assigned to users to provide access to specific resources.
admin.system.users	Stores a user's authentication credentials and all roles assigned to the user.
admin.system.version	Stores the architecture version of the user credential document.
<database>.system.namespaces	Contains all collection information in the database.
<database>.system.indexes	lists all indexes in a database.
<database>.system.profile	Contains slow query logs of a database.
<database>.system.js	Contains special JavaScript code for server-side JavaScript.
<database>.system.views	Contains information about each view of a database.