Database Connection Pool Exhaustion: Causes and Fixes
Why apps hit 'too many connections', how connection pool exhaustion happens, and how to diagnose, size, and fix it before it takes your database down.
ActiveRecord Monitoring: N+1, Slow Queries & Pool Exhaustion
Detect ActiveRecord N+1 queries, slow SQL and pool exhaustion in Rails. Bullet, Prosopite, pg slow logs, Sidekiq pool sizing, and HTTP latency as canary.
MySQL Production Monitoring: Slow Queries, Replication, Locks
Monitor MySQL in production. Performance Schema, slow query log, InnoDB buffer pool, replication lag, deadlocks, and alert thresholds.
PostgreSQL Production Monitoring: Slow Queries & Replication
Monitor PostgreSQL in production. pg_stat_statements, replication lag, autovacuum bloat, lock trees, connection pools, and alert thresholds.
Redis Production Monitoring: Memory, Eviction & Latency
Monitor Redis in production. INFO sections, maxmemory eviction, latency spikes, slowlog, replication, persistence, big keys, and cluster mode.
MongoDB Monitoring: Uptime, Replicas, and Clusters
MongoDB fails differently than SQL. Learn to monitor replica sets, sharded clusters, slow queries, and connection pools for production.
Database Monitoring: How to Monitor MySQL, PostgreSQL, and Redis Uptime
Database downtime brings your entire application down. Learn how to monitor MySQL, PostgreSQL, and Redis uptime, connectivity, and performance from outside.