chore: import upstream snapshot with attribution

cli-tool/components/commands/performance/optimize-database-performance.md

@@ -0,0 +1,83 @@
+---
+allowed-tools: Read, Bash, Grep, Glob
+argument-hint: [database-type] | --postgresql | --mysql | --mongodb
+description: Optimize database queries, indexing, and performance for improved response times and scalability
+---
+
+# Optimize Database Performance
+
+Optimize database queries and performance: **$ARGUMENTS**
+
+## Instructions
+
+1. **Database Performance Analysis**
+   - Analyze current database performance and identify bottlenecks
+   - Review slow query logs and execution plans
+   - Assess database schema design and normalization
+   - Evaluate indexing strategy and query patterns
+   - Monitor database resource utilization (CPU, memory, I/O)
+
+2. **Query Optimization**
+   - Identify and optimize slow-performing queries
+   - Analyze query execution plans and optimization strategies
+   - Rewrite queries for better performance and efficiency
+   - Implement query hints and optimization directives
+   - Configure query timeout and resource limits
+
+3. **Index Strategy Optimization**
+   - Analyze existing indexes and their usage patterns
+   - Design optimal indexing strategy for query patterns
+   - Create composite indexes for multi-column queries
+   - Implement covering indexes to avoid table lookups
+   - Remove unused and redundant indexes
+
+4. **Schema Design Optimization**
+   - Optimize table structure and data types
+   - Implement denormalization strategies for read-heavy workloads
+   - Design partitioning strategies for large tables
+   - Create materialized views for complex aggregations
+   - Optimize foreign key relationships and constraints
+
+5. **Connection Pool Optimization**
+   - Configure optimal database connection pooling settings
+   - Tune connection pool size and timeout settings
+   - Implement connection monitoring and health checks
+   - Optimize connection lifecycle and cleanup procedures
+   - Configure connection security and SSL settings
+
+6. **Query Result Caching**
+   - Implement intelligent database result caching
+   - Design cache invalidation strategies for data consistency
+   - Set up query-level and result-set caching
+   - Configure cache expiration and refresh policies
+   - Monitor cache effectiveness and hit rates
+
+7. **Database Monitoring and Profiling**
+   - Set up comprehensive database performance monitoring
+   - Monitor query performance and resource usage
+   - Track database connections and session activity
+   - Implement alerting for performance degradation
+   - Configure automated performance reporting
+
+8. **Read Replica and Load Balancing**
+   - Configure read replicas for query distribution
+   - Implement intelligent read/write query routing
+   - Set up load balancing across database instances
+   - Monitor replication lag and consistency
+   - Configure failover and disaster recovery procedures
+
+9. **Database Vacuum and Maintenance**
+   - Implement automated database maintenance procedures
+   - Configure vacuum and analyze operations for optimal performance
+   - Set up index rebuilding and maintenance schedules
+   - Monitor table bloat and fragmentation
+   - Implement automated cleanup and archival strategies
+
+10. **Performance Testing and Benchmarking**
+    - Set up database performance testing frameworks
+    - Implement load testing scenarios for realistic workloads
+    - Benchmark query performance under different conditions
+    - Test database scalability and capacity limits
+    - Monitor performance regression and improvements
+
+Focus on database optimizations that provide the most significant performance improvements for your specific workload patterns. Always measure performance before and after changes to validate optimizations.