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Document Database for MongoDB

FAQ

FAQ overview

FAQ overview

This topic summarizes the FAQs for Document Database for MongoDB.

Instance management

What are the differences between Document Database for MongoDB and open-source MongoDB?

What instance specifications does Document Database for MongoDB provide?

Is it supported to configure instances with same name under same account and region?

How many Document Database for MongoDB instances can be created?

Which database versions does Document Database for MongoDB support?

How to view the database version used by MongoDB instance?

How to upgrade the database version for MongoDB instance, for example, from MongoDB 5.0 to 6.0?

How to upgrade instance from replica set to sharding cluster?

Why can't I see the instance I just created on the MongoDB console?

Why is the data backup file displayed in backup file list larger than actually downloaded backup file?

Why can't the subnets under this private network be found when creating MongoDB instance after modifying the project to which a private network belongs?

What should be done after receiving event monitoring alarm for the oplog window being insufficient?

Instance configuration modification

Does Document Database for MongoDB support increasing or decreasing nodes or shards?

What should I do if an error occurs during the pre-check stage of changing the instance configuration?

Why does the instance experience performance jitter (such as increased business access latency) when adding shards?

Account permissions

What account permissions does Document Database for MongoDB currently provide?

Why is there already an account after instance created?

How to create MongoDB database account?

How to authorize cross-service access for IAM users?

How to change password of MongoDB database account?

Why do connections fail when account passwords in the connection string include special characters?

Network connection

Does Document Database for MongoDB support public network access?

What languages does MongoDB support for client connection?

How can I connect to MongoDB instance via a non-root account?

What is the maximum number of connections for a MongoDB instance?

How to check the connection usage of a MongoDB instance?

How to view the client source of connections to a MongoDB instance?

How to limit the number of client connections accessing a MongoDB instance?

After adding a new node to a replica set instance (or a new Mongos node to a sharding cluster instance), is it necessary to modify the connection address of the application to connect to the new node?

Does MongoDB support the SRV connection method?

How to check the IP address corresponding to the MongoDB connection address?

Does it support modifying the domain name of the MongoDB connection address?

Does MongoDB support read/write splitting feature?

Features

Does Document Database for MongoDB support multi-document transactions?

Does Document Database for MongoDB support nested documents?

How does Document Database for MongoDB address node failures?

At what disk utilization percentage will the instance reject data writes?

What are the differences in features supported by different MongoDB versions?

Backup and recovery

In the backup list, the "Restore to a new instance" button is grayed out and cannot be clicked. What should I do?

Is it necessary to manually create a new instance before performing point-in-time recovery?

Can point-in-time recovery be accurate to the minute?

What factors influence the time required for point-in-time recovery?

How to handle slow or stalled recovery progress?

During the recovery process, if the original instance status changes to "Recovering," will it affect online services?

Can multiple recovery tasks be initiated simultaneously for the same instance?

Database and table rollback failed due to insufficient storage space. What should I do?

Accidentally deleted a table or some data, what's the easiest way to recover?

After an instance is released, how long are my manually created backups retained?

Errors and exceptions

Why does reading or writing data fail after creating a new database with the same name as a deleted one?

Why can't instances connect via public network address, or why do commands executed after connecting via public network address get stuck?

Why does connecting to MongoDB instance with private domain name fail, and the error message contains public domain name information?

Why does the error unrecognized pipeline stage name sometimes occur when executing commands?

Why doesn't instance always select optimal index?

How to troubleshoot and resolve connection failures caused by connection exhaustion in sharding instances?

Last updated: 2026.07.03 11:36:43