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How much storage does MongoDB use?
Because MongoDB uses a journal file size limit of 100 MB, WiredTiger creates a new journal file approximately every 100 MB of data.
Can I delete MongoDB journal?
The long answer: No, deleting the journal file isn’t safe. The idea of journalling is this: A write comes in. Now, to make that write persistent (and the database durable), the write must somehow go to the disk.
Is MongoDB free forever?
It’s Free — Forever That means there’s no credit card required.
Where is the MongoDB data stored?
Install MongoDB On Windows MongoDB requires a data folder to store its files. The default location for the MongoDB data directory is c:\data\db. So you need to create this folder using the Command Prompt.
Is Redis in-memory database?
Redis is an in-memory but persistent on disk database, so it represents a different trade off where very high write and read speed is achieved with the limitation of data sets that can’t be larger than memory.
Why does MongoDB Keep Holding on to disk space?
MongoDB will keep holding on to the entire 10 GB disk space it had before, so it can use that same space to accommodate new data. You can easily see this yourself by running a db.stats(): The dataSize parameter shows the size of the data in the database, while storageSize shows the size of data plus unused/freed space.
What does the datasize parameter on MongoDB mean?
The dataSize parameter shows the size of the data in the database, while storageSize shows the size of data plus unused/freed space. The fileSize parameter, which is essentially the space your database is taking up on disk, includes the size of data, indexes, and unused/freed space.
What happens if I delete 10 GB of data from MongoDB?
Here’s a simple example: Let’s say you have 10 GB of data in a MongoDB database, and you delete 3 GB of that data. However, even though that data is deleted and your database is holding only 7 GB worth of data, that unused 3 GB will not be released to the OS.
What is compact Command in MongoDB used for?
Running the compact command places a block on all other operations at the database level, so you have to plan for some downtime. If your storage engine is MMAPv1, this is your way forward. The repairDatabase command is used for checking and repairing errors and inconsistencies in your data.