Common questions

Do you need cache with MongoDB?

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Do you need cache with MongoDB?

Does MongoDB handle caching? MongoDB keeps most recently used data in RAM. If you have created indexes for your queries and your working data set fits in RAM, MongoDB serves all queries from memory. MongoDB does not cache the query results in order to return the cached results for identical queries.

Why you should never ever ever use MongoDB?

There are no valid usecases for MongoDB. It is technically inferior to other options, does not offer exclusive features that actually work, and the developers are failing to ensure data integrity and security – arguably two of the most important aspects of a database.

Is Redis needed for MongoDB?

Redis isn’t a replacement for your general purpose database, be it MongoDB or PostgreSQL. It’s better to think of it as a memory turbo-boost for your stack. You can use it as a straight cache, but the real power comes when you use Redis’s ability to manipulate the data it holds in memory.

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Does MongoDB store data in memory?

MongoDB is not an in-memory database. Although it can be configured to run that way. But it makes liberal use of cache, meaning data records kept memory for fast retrieval, as opposed to on disk.

Is MongoDB faster than MySQL?

MongoDB is faster than MySQL due to its ability to handle large amounts of unstructured data when it comes to speed. It uses slave replication, master replication to process vast amounts of unstructured data and offers the freedom to use multiple data types that are better than the rigidity of MySQL.

Is Redis just a cache?

9 Answers. No, Redis is much more than a cache. Like a Cache, Redis stores key=value pairs. But unlike a cache, Redis lets you operate on the values.

Is Redis a cache or database?

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker.

How much RAM does MongoDB need?

approximately 1GB
MongoDB requires approximately 1GB of RAM per 100.000 assets. If the system has to start swapping memory to disk, this will have a severely negative impact on performance, and should be avoided.

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How do I reduce space in MongoDB?

Getting your free space back

  1. Compacting individual collections. You can compact individual collections using the compact command.
  2. Compacting one or more databases. For a single-node MongoDB deployment, you can use the db.
  3. Compacting all databases on a server by re-syncing replica set nodes.
  4. usePowerOf2Sizes.