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HomeMinervaDB

MinervaDB

PostgreSQL Support diagram of the query lifecycle from parse to execute with planner inputs, pg_stat_statements instrumentation and a wait event triage table
MinervaDB

Optimizing SQLs in PostgreSQL 18.4: 12 Proven Techniques for Peak Performance

A practical field manual for optimizing SQLs in PostgreSQL 18.4: EXPLAIN with buffers, B-tree skip scans, asynchronous I/O, statistics, join tuning, six animated diagrams and seven premium diagnostic scripts.
[...]
Database Infrastructure

MariaDB 12.3 LTS: Advances and Building Fault-Tolerant MariaDB Infrastructure at Internet Scale

MariaDB 12.3 is the current long-term support release of MariaDB Community Server. It reached Stable/GA on 28 May 2026 and is maintained until June 2029, making it the first LTS line since MariaDB 11.8. For [...]
Milvus Observability
Milvus

Milvus Observability and Monitoring Infrastructure: Performance, Scalability, and High Availability

Most engineering teams discover the limits of their Milvus observability at two in the morning, somewhere between a p99 that has quietly tripled and a Grafana dashboard that only knows how to show CPU. Milvus [...]
Essential MariaDB Performance Metrics
MariaDB

MariaDB Performance Monitoring: 20 Essential Metrics Every DBA Should Track for Troubleshooting

Why MariaDB Performance Monitoring Fails Without Baselines MariaDB performance monitoring is what separates a diagnosis from a guess. Most MariaDB incidents are never actually diagnosed. When a production cluster degrades at 02:00, the on-call DBA [...]
Redis Performance Troubleshooting
Data Strategy

Redis Performance Troubleshooting: A Field Guide to Diagnosing and Resolving Production Bottlenecks

Redis Performance Troubleshooting is the single most valuable skill for any team running Redis at scale. When a production Redis instance slows down, the symptoms are rarely obvious: latency spikes appear intermittently, memory climbs without [...]
PostgreSQL 18 Performance
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 [...]
Partitioned Table Statistics
MinervaDB

Partitioned Table Statistics in PostgreSQL: How ANALYZE Fixed a Slow Query

Partitioned table statistics are one of the most misunderstood corners of PostgreSQL performance tuning, and getting partitioned table statistics right is often the fastest win available to a DBA. A partitioned table can look perfectly [...]
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;. [...]
Milvus Vector Database
AI

Milvus Vector Database: 7 Powerful Scalable Search Tips

Milvus vector database has quickly become one of the most widely adopted open-source engines for powering similarity search at scale. As AI applications move from experimental notebooks into production systems that serve billions of requests, [...]
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 [...]

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* 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. 

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Table of Contents

×
  • What Is a Patroni Standby Cluster?
  • Why Do We Use a Patroni Standby Cluster?
  • Prerequisites for the Standby Cluster
  • Bootstrapping the Standby Cluster
  • Checking the Standby Cluster
  • Playing With the Architecture
  • Promoting the Standby Cluster
  • Best Practices for Patroni Standby Clusters
  • Conclusion
  • Frequently Asked Questions
    • What is a Patroni standby cluster?
    • How is a standby cluster different from a normal Patroni replica?
    • Does a switchover on the primary break the standby cluster?
    • How do I promote a Patroni standby cluster?
  • Further Reading
→ Index