Next.js MongoDB Monitoring & Performance Advisor
API routes and Server Actions in Next.js must be highly optimized to keep latency down and prevent DB server lockups. TraceMole tracks database execution metrics directly from serverless execution contexts, offering immediate, actionable index suggestions.
Key Advantages for Next.js
Lightweight database wrappers with near-zero runtime footprint ensure your Vercel or AWS Lambda cold starts remain under critical limits.
Instantly captures slow queries and poor scan-to-return ratios, writing the exact `createIndex` statement required to resolve them.
Why MongoDB queries become slow
In a Next.js framework, APIs and server-side functions scale rapidly. When database query selectors run without correct indexes, the MongoDB engine executes linear scans, parsing every document in a collection. This causes response latency spike, blocks connection pools, and can ultimately lock up your MongoDB server cluster.
When to add an index
An index is required when a query runs a full collection scan (COLLSCAN), or when the scan-to-return documents ratio is high. Creating indexes that match the sorting fields, filter keys, and range parameters of your query ensures the database uses fast index scans (IXSCAN) instead. TraceMole parses database execution logs and provides the exact createIndex statements needed.
Next.js Configuration Hook
Wrap your database clients inside your Serverless or Edge config. Enabling command monitoring maps MongoDB execution plans back to parent routes.
// Import the explain wrapper inside your database connection file
import { MongoClient } from "mongodb";
import { registerTraceMoleListener } from "@tracemole/nextjs-mongodb-explain";
const client = new MongoClient(process.env.MONGO_DB_URL, {
monitorCommands: true // Required to capture query triggers
});
registerTraceMoleListener(client as any, {
slowThreshold: 50 // ms — explain queries slower than 50ms
});Your raw collection data is never sent. TraceMole only shipping queries shape and plan metrics. Keep your cluster fully secure and compliant.