MinervaDB

Enterprise Database Consulting, 24x7 Support and Remote DBA

  • MinervaDB
    • GCC Data Leadership
    • For CTOs
    • For CIOs
    • Full-Stack Optimization
    • MinervaDB University
    • Partner Network
  • Engineering
    • Data Analytics Platform Engineering
    • Fractional CDO
    • Data Science & AI
    • Cloud FinOps
      • MinervaDB Privacy Policy
    • Data Modernization
    • Databricks
    • Snowflake
    • Microsoft Azure
    • AWS
    • Google Cloud
    • AI and Vector Data
    • MySQL
    • PostgreSQL
    • PostgreSQL on Kubernetes
    • SQL Server Consulting
    • MariaDB Consulting
    • MongoDB Consulting
    • Ticketing System
  • Support
    • Enterprise Support
    • 24/7 Emergency DBA
    • PostgreSQL Support
    • MySQL Support
    • MariaDB Support
    • SQL Server Support
    • Db2 LUW & z/OS Support
    • Oracle Database, Exadata & OCI Support
    • MongoDB Support
    • NoSQL
    • Kafka Support
    • Cloud Native
    • Analytics & DWH
    • Data Security
  • Remote DBA
    • 24*7 Emergency DBA
    • PostgreSQL DBA
    • 24/7 MySQL DBA
    • 24/7 MariaDB DBA
    • NoSQL Services
    • MongoDB Services
  • Blog
    • MinervaDB Blog
  • Careers
  • Contact
    • MinervaDB Contacts
    • Book an Appointment
    • MinervaDB FAQ
    • Cookie Policy
    • MinervaDB Privacy Policy
  • Facebook
    • Data Ops. Geek
  • Twitter
    • @MinervaDB
    • @ShivIyer
    • @ChistaDATA
  • LinkedIn
    • Shiv Iyer
  • GitHub
    • @ShivIyer
HomePostgreSQL Troubleshooting

PostgreSQL Troubleshooting

PostgreSQL 18 vacuum tuning diagram showing the autovacuum decision pipeline, new PostgreSQL 18 parameters and per-table policy tiers
PostgreSQL

Your Engineers Shouldn’t Be Doing PostgreSQL 18 Vacuum Tuning at Midnight

PostgreSQL 18 vacuum tuning is a design activity that belongs in a change review, next to your schema migrations and your capacity model. In most engineering organisations it is still handled somewhere else entirely: at [...]
PostgreSQL Replication Lag
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 lock contention featured image for the MinervaDB pg_locks deep dive, showing a three-step blocking chain
Database Performance

Resolving PostgreSQL Lock Contention: A pg_locks Deep Dive

PostgreSQL lock contention resolved: read pg_locks correctly, trace blocking chains, fix deadlocks, and design DDL that never queues production.
[...]
PostgreSQL Wait Events
Monitoring

PostgreSQL Wait Event Analysis: Finding Bottlenecks with pg_stat_activity

PostgreSQL wait events explained: sample pg_stat_activity, interpret Lock, LWLock, IO and Client waits, and turn wait profiles into targeted fixes.
[...]
PostgreSQL Autovacuum Tuning
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.
[...]
PostgreSQL Slow Query Troubleshooting
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.
[...]
PgBouncer performance tuning
Database Performance Tuning

PgBouncer Pool Saturation: Diagnosing Connection Bottlenecks in PostgreSQL

PgBouncer performance tuning for PostgreSQL: diagnose pool saturation with SHOW POOLS, read cl_waiting correctly, size pools, and fix bottlenecks.
[...]
UPDATE LIMIT in PostgreSQL
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;. [...]
Patroni Standby Cluster
MinervaDB

Patroni Standby Cluster: Cascading Replication for PostgreSQL High Availability

PostgreSQL has become the database of choice for organizations that demand reliability, and Patroni sits at the center of most production-grade PostgreSQL high availability deployments. In this in-depth guide we walk through one of Patroni's [...]
MinervaDB

Should I Rebuild My PostgreSQL Index? When and How to REINDEX

Few maintenance questions generate as much confusion in the PostgreSQL community as this one: should I rebuild my PostgreSQL index, and if so, how often? Database administrators arriving from other systems frequently ask, "How can [...]

Posts pagination

1 2 … 9 »

Search MinervaDB Blog 🔎

Tell us how we can help!

Loading

★Read this WARNING★

* Everything changes over time – Our blogs/posts and comments changes over time, That’s how it should be! Whatever we comment from MinervaDB Inc. Teams (including Shiv Iyer) and other stakeholders or guest bloggers posted here are never permanent, These things worked for us. But, there is no guarantee they will work for you too, When using the recommendations from ChistaDATA or MinervaDB or MinervaSQL or any other online resources / Google,  You must test the advice before applying them to your production systems, and always invest for a robust Database DR solution, Thank you for understanding. 

Recent Posts ✏

  • Expensive SQL on Exadata 26.1: Read the Offload Numbers Before You Build the Index
  • SQL Server 2025 Expensive Queries: 7 Proven Ways to Find and Fix Them by Latency and Resource Cost
  • Db2 13 for z/OS Index Efficiency: 8 Proven Troubleshooting Techniques
  • AlloyDB Pricing and Internals: 2026 FinOps Best Practices Guide
  • Google AlloyDB Architecture, Internals and Performance: 2026 Best Practices Guide

☎ Contact Global Sales (24*7)

📞 (844) 588-7287 (USA)

📞 (415) 212-6625 (USA)

 

☎ TOLL FREE PHONE (24*7)

(844) 588-7287 

📌 Our Support Channels (24*7)

✔ Email
✔ IRC
✔ Phone
✔ Ticketing System

🚩 MinervaDB FAX

+1 (209) 314-2364

Corporate Address: California

MinervaDB Inc.
440 N BARRANCA AVE #9718 COVINA,
CA 91723
════════════════════════════════
Email: contact@minervadb.com

Corporate Address: Delaware

MinervaDB Inc.,
PO Box 2093 PHILADELPHIA PIKE #3339
CLAYMONT, DE 19703
════════════════════════════════

Email: contact@minervadb.com

📨 Contact MinervaDB (24*7)

 Email – contact@minervadb.com 

(We are online 24*7)

☛ Contact Shiv Iyer
▬▬▬▬▬▬▬▬▬▬▬▬▬
 Email – shiv@minervadb.com

HOW CAN WE HELP?

We are committed to building Optimal, Scalable, Highly Available, Reliable, Fault-Tolerant and Secured Database Infrastructure Operations for WebScale to our customers globally

📨 Contact MinervaDB Support (24*7)

✔ Support (24*7) – support@minervadb.com

✔ Google Hangouts – support@minervadb.com

(for emergency support and quick response)

💲Flexible Payment

✔ Wire

✔ PayPal

✔ Credit / Debit Cards

✔ Cheque

✔ Cash

★ Discounts ★

Discounts are applicable only for multi-year contracts / long-term engagements, We don’t hire low-quality and cheap rookie consultants to manage your mission-critical Database Systems Infrastructure Operations and so our consulting rates are competitive. Being a virtual corporation (no physical offices anywhere in the world), whatever you pay go directly to our consultant’s fee. It’s impossible for us to offer you low-cost consulting, support and remote DBA services with elite-class team, Thanks for understanding and doing business with MinervaDB.

PostgreSQL is a registered trademark of the PostgreSQL Community Association. ClickHouse is a registered trademark of ClickHouse, Inc. MongoDB is a registered trademark of MongoDB, Inc. Couchbase is a registered trademark of Couchbase, Inc. Redis is a registered trademark of Redis Ltd. Apache Cassandra is a registered trademark of the Apache Software Foundation. Milvus is a registered trademark of Zilliz. MinIO is a registered trademark of MinIO, Inc. Amazon Redshift and Amazon Aurora are registered trademarks of [Amazon.com](http://amazon.com/), Inc. Google Cloud is a registered trademark of Google LLC. Snowflake is a registered trademark of Snowflake Inc. Databricks is a registered trademark of Databricks, Inc. MySQL and InnoDB are registered trademarks of Oracle Corporation. MariaDB is a trademark of MariaDB Corporation Ab. All other trademarks are the property of their respective owners. Copyright © 2010–2026. All Rights Reserved by MinervaDB®.

Table of Contents

×
  • Why the urge to rebuild my PostgreSQL index is often misguided
  • Does the decision to rebuild a PostgreSQL index depend on the index type?
  • How can a tree-like index deteriorate?
    • The importance of densely packed index pages
    • The small impact of bloat on scanning for a single table row
    • Index range scans are more affected by bloat and fragmentation
  • How index bloat happens, and when it makes a rebuild attractive
  • How to rebuild my PostgreSQL index: assessing a B-tree index first
    • Using pgstatindex() before you rebuild my PostgreSQL index
  • How to rebuild a PostgreSQL index safely with REINDEX
  • Should I rebuild my PostgreSQL index for other index types?
  • Should you automate regular index rebuilds in PostgreSQL?
  • Key takeaways on rebuilding a PostgreSQL index
→ Index