Resume MongoDB Change Streams Without Missing Events
Store resume tokens durably so your application can resume MongoDB change streams after restarts without missing events.
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Databases & messaging · #mongodb
Paginate Mongoose Queries with skip() and limit()
Use Mongoose skip() and limit() with countDocuments() for stable, index-aware page-based pagination in Node.js.
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nodejsUsing MongoDB TTL Indexes to Auto‑Expire Session Tokens
See how MongoDB TTL indexes automatically delete expired session tokens, with a step‑by‑step example and notes on latency and maintenance.
Using Mongoose pre('save') Middleware for Reliable Field Normalization
Learn how Mongoose pre('save') middleware centralizes field normalization for regular saves, why bulk operations bypass it, and how to handle the gap safely.
Hashing User Passwords with Mongoose Pre‑save Middleware
Learn how to add a Mongoose pre‑save hook that hashes passwords with bcrypt only when they are changed, keeping plaintext credentials out of MongoDB.
Handling Side Effects in Mongoose: When to Use Document Middleware
Stop repeating data sanitization logic in your controllers. Learn how to use Mongoose pre and post hooks to centralize password hashing and side effects.
Sizing MongoDB WiredTiger cacheSizeGB without starving the OS
How to configure, verify, and safely roll back WiredTiger cacheSizeGB so MongoDB keeps its working set cached while leaving memory for the operating system and application.
Mastering MongoDB $lookup: Join Mechanics, Indexing, Pipeline Tricks, and Sharding Gotchas
Learn how MongoDB’s $lookup joins collections, why indexing the foreign side matters, how to use pipeline stages inside $lookup, and what to watch for on sharded clusters. A concrete example and actionable checklist keep your aggregations fast and memory‑efficient.
Diagnosing and Resolving MongoDB Connection Pool Exhaustion
A diagnostic guide to identifying and fixing MongoDB connection pool exhaustion, covering leak detection, pool tuning, and stale connection management.