Databases & Data Systems

Redis Monitoring

Monitor Redis memory usage, hit rates, connected clients, and replication health in real time with zero configuration.

Why monitor Redis?

Redis is the world's most popular in-memory data store, used as a cache, message broker, and session store by millions of applications. Monitoring Redis is essential to prevent memory overflow, detect cache misses, track eviction rates, and ensure replication consistency. Xitoring's Redis integration provides deep visibility into your Redis instance health.

Auto-discovery via Xitogent — no manual configuration required

Real-time memory usage and fragmentation metrics

Track hit/miss ratios and cache effectiveness

Monitor connected clients and blocked clients

Eviction rate and keyspace tracking

Replication lag and slave status monitoring

Works on both Linux and Windows servers

1-minute metric collection intervals

Metrics

What we monitor

Used Memory

Total memory allocated by Redis including overhead.

Memory Fragmentation Ratio

Ratio of OS-allocated memory to Redis-allocated memory. Values above 1.5 indicate fragmentation.

Connected Clients

Number of currently connected client connections.

Blocked Clients

Number of clients waiting on a blocking call (BLPOP, BRPOP, etc.).

Keyspace Hit Rate

Percentage of successful key lookups vs misses, indicating cache effectiveness.

Evicted Keys

Number of keys removed due to maxmemory policy.

Expired Keys

Number of keys removed due to TTL expiration.

Commands per Second

Rate of commands processed by the Redis server.

Keyspace Size

Total number of keys stored across all databases.

Replication Offset

Replication offset delta between master and replicas.

RDB Last Save

Time since last successful RDB snapshot.

AOF Rewrite

Status and duration of AOF rewrite operations.

Triggers & Alerts

Configurable alert triggers

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

Redis monitoring trigger configuration dashboard

Memory Usage

critical

Fires when Redis memory consumption exceeds your threshold, risking OOM kills or eviction storms.

Connected Clients

warning

Triggers when client connections exceed the threshold, indicating potential connection leaks.

Keyspace Hit Rate

warning

Alerts when cache hit rate drops below threshold, indicating cache inefficiency or working set changes.

Evicted Keys

critical

Fires when eviction rate spikes, meaning Redis is actively removing data to stay within memory limits.

Blocked Clients

warning

Triggers when clients are blocked waiting on operations, indicating queue congestion.

Replication Lag

critical

Alerts when replica offset falls behind the master, risking data inconsistency in failover scenarios.

Importance of Redis Monitoring

Redis serves as the performance backbone for modern applications — handling sessions, caching, rate limiting, and real-time analytics. Without monitoring, memory pressure, eviction storms, and replication drift can silently degrade your entire application stack.

Detect memory pressure before OOM kills crash your instance
Monitor cache hit rates to ensure optimal application performance
Track eviction patterns to right-size your memory allocation
Identify connection leaks from application clients
Ensure replication consistency for high-availability setups

Redis monitoring dashboard with memory and hit rate metrics

Cache performance alerts and eviction monitoring

Why Choose Xitoring

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