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What is the size of MongoDB database?
BSON Documents The maximum BSON document size is 16 megabytes. The maximum document size helps ensure that a single document cannot use excessive amount of RAM or, during transmission, excessive amount of bandwidth. To store documents larger than the maximum size, MongoDB provides the GridFS API.
How do I find the size of a collection in MongoDB?
collection. totalSize() method is used to reports the total size of a collection, including the size of all documents and all indexes on a collection. Returns: The total size in bytes of the data in the collection plus the size of every index on the collection.
How do I get MongoDB metadata?
2 Answers. You can check this link https://docs.mongodb.com/v3.0/tutorial/create-an-auto-incrementing-field/. Then you can get those metadata according to the collection name. If you want to add a field to this document, just use $set with update.
What does$ collstats do in MongoDB cluster?
For a collection in a replica set or a non-sharded collection in a cluster, $collStats outputs a single document. For a sharded collection , $collStats outputs one document per shard. The output document includes the following fields: The namespace of the requested collection or view. The name of the shard the output document corresponds to.
How to calculate the size of a MongoDB collection?
This page documents the mongo shell method, and does not refer to the MongoDB Node.js driver (or any other driver) method. For corresponding MongoDB driver API, refer to your specific MongoDB driver documentation instead. The total size in bytes of the data in the collection plus the size of every index on the collection.
What should the scale factor be in MongoDB?
The value defaults to 1 to return size data in bytes. To display kilobytes rather than bytes, specify a scale value of 1024. If you specify a non-integer scale factor, MongoDB uses the integer part of the specified factor. For example, if you specify a scale factor of 1023.999, MongoDB uses 1023 as the scale factor.
What is the value of db.collection.totalindexsize ( )?
The value returned is the sum of db.collection.storageSize () and db.collection.totalIndexSize () in bytes. Starting in MongoDB 4.4, to run on a replica set member, collStats operations require the member to be in PRIMARY or SECONDARY state. If the member is in another state, such as STARTUP2, the operation errors.