Databases & Data Systems

MongoDB Monitoring

Monitor MongoDB document operations, replica set health, connections, and storage metrics in real time with zero configuration.

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Why monitor MongoDB?

MongoDB is the leading NoSQL document database, powering modern applications with flexible schemas and horizontal scalability. Monitoring MongoDB is critical to track query performance, detect replication lag, manage connection pools, and prevent storage exhaustion. Xitoring's MongoDB integration provides deep visibility into your database cluster health.

Auto-discovery via Xitogent — no manual configuration required

Real-time document operation metrics (insert, update, delete, query)

Replica set health and replication lag monitoring

Connection pool usage and active connection tracking

WiredTiger cache utilization and eviction metrics

Storage size and index performance monitoring

Works on both Linux and Windows servers

1-minute metric collection intervals

Metrics

What we monitor

Document Operations

Rate of insert, update, delete, and query operations per second.

Connections

Current active, available, and total connections to the MongoDB instance.

Replication Lag

Time delay between primary and secondary replica set members.

Oplog Window

Duration of operations retained in the oplog for replication.

WiredTiger Cache

Bytes currently in cache, dirty bytes, and cache hit ratio.

Page Faults

Number of page faults indicating data not in memory.

Cursors

Number of open cursors including those with no timeout.

Network I/O

Bytes in/out and number of requests to the MongoDB instance.

Lock Queue

Number of operations waiting to acquire read or write locks.

Index Counters

Index access, hits, and misses indicating index effectiveness.

Storage Size

Total data size, index size, and free space on disk.

Assertions

Count of assert messages including regular, warning, and rollover.

Triggers & Alerts

Configurable alert triggers

Set up custom triggers in your dashboard to get notified the moment MongoDB metrics cross your defined thresholds.

MongoDB monitoring trigger configuration dashboard

Replication Lag

critical

Fires when secondary members fall behind the primary, risking data inconsistency during failover.

Connection Count

warning

Triggers when active connections approach the maximum, indicating potential connection pool exhaustion.

WiredTiger Cache Usage

warning

Alerts when cache utilization exceeds threshold, leading to increased disk I/O and slower queries.

Page Faults

critical

Fires when page fault rate spikes, indicating working set exceeds available memory.

Lock Queue Length

warning

Triggers when operations queue for locks, indicating contention and potential performance degradation.

Storage Space

critical

Alerts when disk space usage exceeds threshold, risking database writes being blocked.

Importance of MongoDB Monitoring

MongoDB powers mission-critical applications handling millions of documents. Without monitoring, replication drift, connection exhaustion, and cache pressure can silently degrade performance and lead to data loss.

Detect replication lag before failover causes data inconsistency
Monitor document operation rates to identify performance bottlenecks
Track WiredTiger cache efficiency to optimize memory allocation
Identify connection pool exhaustion from application clients
Ensure storage capacity for uninterrupted database operations

MongoDB monitoring dashboard with document operations and replica set metrics

MongoDB performance alerts and connection monitoring

Why Choose Xitoring

Xitoring delivers enterprise-grade MongoDB monitoring with zero-config setup. Our lightweight agent auto-discovers your MongoDB instances, starts collecting metrics in under 60 seconds, and integrates with your existing notification channels.