Cache Diagnostic

This skill provides deep cache analysis and optimization recommendations for Magento 2.

What This Skill Does

1. Cache Configuration Analysis

   • Cache type status for all 15+ Magento cache types
   • Backend configuration (File, Redis, Memcached)
   • Full Page Cache (FPC) backend (Varnish, Built-in, Redis)
   • Cache prefix and tag configuration
   • Cache lifetime settings

2. Redis Analysis (if applicable)

   • Redis connection and version
   • Memory usage and fragmentation
   • Keyspace analysis and database usage
   • Eviction policy and maxmemory settings
   • Hit rate statistics
   • Slow log analysis

3. Varnish Analysis (if applicable)

   • Varnish version and configuration
   • Hit rate and cache effectiveness
   • Backend health and response times
   • ESI hole configuration
   • Cache invalidation (PURGE) functionality
   • VCL configuration validation

4. Cache Performance Metrics

   • Cache hit/miss ratios per cache type
   • Cache size and growth trends
   • Cache warming status
   • Invalidation frequency and patterns
   • Cache-related errors and warnings

5. Application Cache Analysis

   • Config cache efficiency
   • Layout cache effectiveness
   • Block HTML cache usage
   • Collections cache status
   • EAV cache efficiency

Diagnostic Commands

# Cache Status
bin/magento cache:status
bin/magento config:show --scope=default | grep cache

# Redis Analysis
redis-cli INFO
redis-cli INFO stats
redis-cli --latency
redis-cli SLOWLOG GET 10

# Varnish Analysis
varnishstat -1
varnishlog -q "RespStatus >= 400" -n 100
varnishadm vcl.list