40 lines
1.4 KiB
Markdown
40 lines
1.4 KiB
Markdown
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---
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title: Monitor Key Redis Metrics
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impact: MEDIUM
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impactDescription: Early detection of performance and capacity issues
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tags: observability, metrics, monitoring, memory, connections
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description: Monitor Key Redis Metrics
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alwaysApply: true
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---
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## Monitor Key Redis Metrics
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Track these metrics to catch issues before they impact users.
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| Metric | What It Tells You | Alert When |
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|--------|-------------------|------------|
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| `used_memory` | Current memory usage | > 80% of maxmemory |
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| `connected_clients` | Number of connections | Sudden spikes or drops |
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| `blocked_clients` | Clients waiting on blocking ops | > 0 sustained |
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| `instantaneous_ops_per_sec` | Current throughput | Significant drops |
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| `keyspace_hits/misses` | Cache hit ratio | Hit ratio < 80% |
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| `rejected_connections` | Connection limit issues | > 0 |
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| `rdb_last_save_time` | Last persistence snapshot | Too old |
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**Correct:** Export metrics to your monitoring system.
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```python
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# Get key metrics
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info = redis.info()
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print(f"Memory: {info['used_memory_human']}")
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print(f"Connections: {info['connected_clients']}")
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print(f"Ops/sec: {info['instantaneous_ops_per_sec']}")
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print(f"Hit ratio: {info['keyspace_hits'] / (info['keyspace_hits'] + info['keyspace_misses']) * 100:.1f}%")
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```
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**Redis Insight:**
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Use Redis Insight for visual monitoring, query profiling, and debugging. It includes Redis Copilot for natural language queries.
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Reference: [Redis Insight](https://redis.io/insight/)
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