How to avoid 'hot' documents?
I am getting errors about 'hot' documents when I try to update a popular item. It seems like everyone is trying to update the same document at once. How can I distribute this load? Should I be using a...
How to use the Attribute pattern?
I heard about the attribute pattern for handling varying product specifications. I have looked at some docs but still don't fully get it. Can someone explain it like I am a beginner? I have a store wi...
Is MongoDB suitable for inventory management?
I am skeptical about using MongoDB for an inventory system because I need strict consistency for stock counts. Is there a way to handle atomic increments safely, or is this a scenario where I should j...
Is the bucket pattern right for time-series data?
I am working with sensor data that arrives every second. I heard that the bucket pattern is a standard for this. Can someone explain why this is better than storing each event as an individual documen...
What are the common causes of high memory usage?
My MongoDB instance keeps running out of RAM and then crashes. I checked the collection sizes and they are not that big. What else could be causing such high memory pressure? I suspect it might be my ...
How to handle multi-document transactions?
I know MongoDB supports multi-document transactions now, but I hear they have a performance cost. Is it better to restructure my schema to avoid transactions entirely, or should I lean into them for f...
How to handle circular references in documents?
I have a tree structure for categories. Parent categories have child IDs, and children have a parent ID. Querying this feels really messy because I have to do multiple lookups to reconstruct the tree....
What are the common pitfalls in MongoDB schema design?
I come from a SQL background and I feel like I am fighting the database. I keep trying to normalize my data into different collections, but I suspect that might be the wrong approach here. What are th...
How to handle session management?
I need to store user sessions and they expire after 30 minutes. I know about TTL indexes, but is that the most performant way to clear out data? I am seeing a lot of deletes happening in the backgroun...
How to explain Collections vs Streams in an interview?
I use both every day, but when asked about the core differences in an interview, I tend to get muddled. Can someone provide a concise way to compare the two? I am looking for an answer that highlights...
