PostgreSQL
Troubleshooting PostgreSQL Streaming Replication Lag in Production
PostgreSQL replication lag troubleshooting: measure send, flush and replay lag via pg_stat_replication, isolate the bottleneck stage, and fix it.
[...] PostgreSQL Performance
PostgreSQL
Diagnosing Autovacuum Lag and Table Bloat in PostgreSQL Production Systems
PostgreSQL autovacuum tuning for production: diagnose autovacuum lag, measure table bloat, fix per-table thresholds, and prevent wraparound risk.
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PostgreSQL
Troubleshooting Slow PostgreSQL Queries with EXPLAIN ANALYZE and pg_stat_statements
PostgreSQL slow query troubleshooting with EXPLAIN ANALYZE and pg_stat_statements: find, diagnose, and fix slow queries in production, step by step.
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MinervaDB
PostgreSQL 18 Performance Configuration Matrix: New Parameters and MinervaDB Tuning Recommendations
The release of PostgreSQL 18 introduces one of the most consequential rounds of configuration changes the project has shipped in years. For database engineers and site reliability teams, understanding PostgreSQL 18 performance tuning is no [...]
Datatbase Systems
How to Do UPDATE … LIMIT in PostgreSQL (With Standard SQL Alternatives)
If you have ever migrated a workload from MySQL to PostgreSQL, you have probably hit a wall the first time you tried to run a statement like UPDATE mytable SET status = 'done' LIMIT 100;. [...]
Datatbase Systems
PostgreSQL Rogue Index Troubleshooting Tips and Tricks in PostgreSQL 17
If you have been managing PostgreSQL databases for any length of time, you have almost certainly run into the situation where an index that was supposed to help your queries is somehow making things worse. [...]
PostgreSQL
PostgreSQL Autovacuum Tuning: Internals, Configuration, and Best Practices for High-Performance Databases
PostgreSQL autovacuum tuning is essential for maintaining high-performance production databases. PostgreSQL autovacuum is one of the most critical—and most misunderstood—background processes in any database environment. When tuned correctly, autovacuum silently keeps your tables lean, your [...]
Datatbase Systems
Why Your PostgreSQL Query Reads Millions of Blocks
Why Your PostgreSQL Query Reads Millions of Blocks to Return Zero Rows (And How to Fix It) A deep dive into index bloat, dead tuples, and MVCC visibility in high-throughput PostgreSQL tables If you’ve ever […]
Datatbase Systems
PostgreSQL MVCC Fundamentals
PostgreSQL MVCC Fundamentals PostgreSQL’s Multi-Version Concurrency Control (MVCC) is the mechanism that allows readers and writers to operate without blocking each other. The trade-off is one that surprises many production teams: every UPDATE and DELETE […]
MinervaDB
Optimizing Pagination in PostgreSQL 17
Optimizing Pagination in PostgreSQL 17: Why OFFSET/LIMIT Fails and What to Use Instead Pagination with OFFSET/LIMIT in PostgreSQL 17 is a common but often costly pattern, especially in read-heavy applications. While it appears simple to […]