Browse all server troubleshooting guides and configuration walkthroughs tagged with #database.
Resolve the Laravel `SQLSTATE[42S02]` error during `artisan migrate` on Ubuntu 20.04 LTS. This guide covers database connection, permissions, caching, and Docker-related fixes.
Troubleshoot and fix MySQL Error 1040 'Too many connections' on Ubuntu 20.04 LTS. Learn to adjust system limits and MySQL configurations for optimal performance.
Is your Docker Compose app failing to connect to the database on startup? Learn why 'depends_on' isn't enough and how to properly ensure service readiness.
Resolve MySQL Error 1215 when adding foreign key constraints. This guide covers common causes like data type mismatches, missing indexes, and engine issues.
Resolve 'MySQL Lock wait timeout exceeded' errors by diagnosing long-running transactions, deadlocks, and optimizing MySQL queries and server settings.
Resolve 'PostgreSQL connection limit reached' errors by optimizing `max_connections`, implementing pooling, and reviewing `pg_hba.conf`.
Resolve the common PostgreSQL 'connection to server on socket pg_hba.conf failed' error. This guide covers server status, UNIX socket paths, and critical pg_hba.conf authentication issues for local connections.
Resolve PostgreSQL deadlocks related to transaction cancel lock conflicts. Diagnose root causes from logs, optimize queries, and refine application logic.
Resolve critical PostgreSQL pg_log disk space exhaustion issues causing 'lock folder block' errors. Learn to free space, prevent recurrence, and restore database operations.
Diagnose and resolve MySQL 'Too Many Connections' errors by adjusting max_connections, hunting idle connections, and optimizing pool sizes.
