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The buildInfo command is an administrative command which returns a build summary for the current mongod.

{ buildInfo: 1 }

The information provided includes the following:

  • The version of MongoDB currently running.
  • The information about the system that built the “mongod” binary, including a timestamp for the build.
  • The architecture of the binary (i.e. 64 or 32 bits.)
  • The maximum allowable BSON object size in bytes (in the field maxBsonObjectSize.)