PostgreSQL pg_restore: Restore Dumps & Fix Errors
Learn to restore PostgreSQL dumps with `pg_restore` and troubleshoot common errors like 'role does not exist' or version mismatches, for DBAs and…
Database
Amministrazione e ottimizzazione di database relazionali e NoSQL: MySQL, PostgreSQL, MongoDB, Redis. Query tuning, backup, replica e alta disponibilità.
Oracle RMAN: Database Recovery After Failure
Learn Oracle RMAN restore and recover commands for database failures. This guide covers control file, full, and point-in-time recovery, tested on Oracle…
Oracle DBA: Daily Checks for Real-World Output
Learn essential Oracle DBA daily checks with real SQL and Bash commands. Monitor instance, tablespace, backups, and sessions on Oracle 19c for…
PostgreSQL Replica Lag: Monitor Across Data Centers
Learn to configure, monitor, and troubleshoot PostgreSQL 15 asynchronous replication lag across data centers with specific SQL queries and `pg_basebackup` for robust…
PostgreSQL: Find Killer Queries with pg_stat_statements
Identify and optimize PostgreSQL killer queries with pg_stat_statements 16.3. Learn to enable, query, and troubleshoot for peak database performance.
Elasticsearch OOM: Cluster RED from Unassigned Shard
Fix Elasticsearch cluster RED status caused by an unassigned shard due to full disk. Learn to use `_cluster/allocation/explain` and `_cluster/reroute` for fast…
Oracle DBA Checklist: 10 Daily Checks for Production Databases (2026)
Master Oracle DBA daily checks for production databases. Learn 10 essential routines to ensure stability, performance, and prevent critical incidents.
PostgreSQL: Optimizing Slow Queries with EXPLAIN ANALYZE (2026)
Learn to optimize PostgreSQL slow queries with EXPLAIN ANALYZE, `pg_stat_statements`, and indexing strategies for high-performing databases.
Oracle RMAN: Production Backup & Recovery Guide (2026)
Learn to configure and manage Oracle RMAN for robust production backup and point-in-time recovery, minimizing downtime for DBAs and IT managers.
PostgreSQL Recovery: Database Corruption in Production (2026)
Learn how to recover a corrupted PostgreSQL database in production using PITR and WAL archiving, minimizing data loss and ensuring business continuity.