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Practical guides on Postgres performance, query tuning, and schema design.

• Reading EXPLAIN Plans

  Understand every node in a Postgres EXPLAIN ANALYZE output — seq scans, index scans, hash joins, sort spills, and more.

• Postgres Query Regression Detection

  Use pg_stat_statements baselines and delta analysis to catch query regressions before they reach production.

• Postgres MVCC Internals

  How xmin/xmax tuple headers, snapshot isolation, and vacuum work together — and why long transactions are dangerous.

• Postgres Autovacuum Tuning

  Default autovacuum settings fail large tables. Learn the threshold math and per-table configuration to keep bloat under control.

• Postgres Index Bloat: Detection and Cleanup

  How dead index entries accumulate, how to measure bloat with pgstattuple, and how to rebuild indexes without downtime.

• Postgres Connection Pooling with PgBouncer

  Why Postgres connections are expensive, how PgBouncer transaction-mode pooling works, and how to size your pool correctly.

• Postgres Table Partitioning

  Range, list, and hash declarative partitioning, partition pruning, index strategies, and the operational pitfalls teams hit in production.

• Postgres WAL and Replication

  How WAL provides durability, physical vs logical replication, replication slot lag risks, and how to monitor standby lag.

• Postgres Lock Types and Deadlocks

  Relation locks, row-level locks, advisory locks, how to read pg_locks, and how to prevent deadlocks before they reach production.

• pg_stat_statements: Query Performance Monitoring

  Enable pg_stat_statements, find the top query cost drivers by total_time and mean_time, and set a snapshot and reset cadence.