db.collection.reIndex()
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Definition
db.collection.reIndex()Deprecated since version 6.0.
Attempting to run the
db.collection.reIndex()method writes a warning message to the log.Important
mongosh Method
This page documents a
mongoshmethod. This is not the documentation for database commands or language-specific drivers, such as Node.js.For the database command, see the
reIndexcommand.For MongoDB API drivers, refer to the language-specific MongoDB driver documentation.
The
db.collection.reIndex()drops all indexes on a collection and recreates them. This operation may be expensive for collections that have a large amount of data and/or a large number of indexes.Warning
db.collection.reIndex()may only be run on standalone instances.For most users, the
db.collection.reIndex()command is unnecessary.
Compatibility
This method is available in deployments hosted in the following environments:
MongoDB Atlas: The fully managed service for MongoDB deployments in the cloud
Important
This command is not supported in M0, M2, and M5 clusters. For more information, see Unsupported Commands.
MongoDB Enterprise: The subscription-based, self-managed version of MongoDB
MongoDB Community: The source-available, free-to-use, and self-managed version of MongoDB
Behavior
For MongoDB 5.0 or later, db.collection.reIndex() may only be
run on standalone instances.
Resource Locking
db.collection.reIndex() obtains an exclusive (W) lock on the
collection and blocks other operations on the collection until it completes.
For more information on locking in MongoDB, see FAQ: Concurrency.