Is there a limit to how many collections I can have?
I am planning to create a new collection for every user in my app to ensure complete isolation. My coworker says this is a bad idea, but why? Is there a hard limit or just a performance limit to how m...
How to store financial transactions securely?
I am working on a ledger application. I need to make sure my data is accurate and immutable. Is there a specific document structure for financial records that helps with auditing? I am worried about s...
Can I use MongoDB for real-time analytics?
I want to store user event logs and run aggregation queries to see real-time trends. My current approach is just dumping everything into a single collection, but the aggregations are getting slow. Wha...
How can I monitor document growth over time?
I am worried about my documents growing too large and causing fragmentation. Is there a way to track the average size of documents in a collection over time? I want to be proactive about re-shaping my...
What is the best way to monitor query performance?
I have a few endpoints that feel slow, but I do not know which specific queries are to blame. What tools should I be using to profile my database? I have heard of explain(), but I find the output real...
How to handle big int values?
I am working with large numbers that exceed the standard 64-bit integer size. Does MongoDB handle this natively or do I need to store them as strings? I am worried about sorting and filtering on these...
Why is my aggregation pipeline so slow?
I am running a complex aggregation to calculate monthly stats. It works on my dev machine with 100 docs, but it dies in production with 1 million docs. I am using group, match, and project. How do I d...
How to handle localizing data in a global app?
My app is going global and I need to support multiple languages for product descriptions. Should I store each language as a nested object in the document, or use separate collections per locale? I wan...
When is it appropriate to use arrays in MongoDB?
I see conflicting advice online about using arrays in documents. Some say it is great for performance, while others warn about memory issues. If I have a list of tags or category IDs, is it better to ...
How to handle field-level encryption?
I need to store sensitive user information like SSNs in my database. I know I should encrypt at rest, but what about field-level encryption? Is there a standard way to do this in the app layer so the ...
