PostgreSQL
PG Replica Identity Explained
March 03, 2021 in PostgreSQL
Replica identity is important - it determines the success or failure of logical replication
Replica identity is important - it determines the success or failure of logical replication
A Methodology for Diagnosing PostgreSQL Slow Queries
February 23, 2021 in PostgreSQL
Slow queries are the sworn enemy of OLTP databases. Here’s how to identify, analyze, and fix them using metrics (Pigsty dashboards), pg_stat_statements, and logs.
Slow queries are the sworn enemy of OLTP databases. Here’s how to identify, analyze, and fix them using metrics (Pigsty dashboards), pg_stat_statements, and logs.
Incident-Report: Patroni Failure Due to Time Travel
February 22, 2021 in PostgreSQL
Machine restarted due to failure, NTP service corrected PG time after PG startup, causing Patroni to fail to start.
Machine restarted due to failure, NTP service corrected PG time after PG startup, causing Patroni to fail to start.
Online Primary Key Column Type Change
January 15, 2021 in PostgreSQL
How to change column types online, such as upgrading from INT to BIGINT?
How to change column types online, such as upgrading from INT to BIGINT?
Golden Monitoring Metrics: Errors, Latency, Throughput, Saturation
November 06, 2020 in PostgreSQL
Understanding the golden monitoring metrics in PostgreSQL
Understanding the golden monitoring metrics in PostgreSQL
Database Cluster Management Concepts and Entity Naming Conventions
June 03, 2020 in PostgreSQL
Concepts and their naming are very important. Naming style reflects an engineer's understanding of system architecture. Poorly defined concepts lead to communication confusion, while carelessly set names create unexpected additional burden. Therefore, they need careful design.
Concepts and their naming are very important. Naming style reflects an engineer's understanding of system architecture. Poorly defined concepts lead to communication confusion, while carelessly set names create unexpected additional burden. Therefore, they need careful design.
PostgreSQL's KPI
May 29, 2020 in PostgreSQL
Managing databases is similar to managing people - both need KPIs (Key Performance Indicators). So what are database KPIs? This article introduces a way to measure PostgreSQL load: using a single horizontally comparable metric that is basically independent of workload type and machine type, called **PG Load**.
Managing databases is similar to managing people - both need KPIs (Key Performance Indicators). So what are database KPIs? This article introduces a way to measure PostgreSQL load: using a single horizontally comparable metric that is basically independent of workload type and machine type, called **PG Load**.
Online PostgreSQL Column Type Migration
January 30, 2020 in PostgreSQL
How to modify PostgreSQL column types online? A general approach
How to modify PostgreSQL column types online? A general approach
Transaction Isolation Level Considerations
November 12, 2019 in PostgreSQL
PostgreSQL actually has only two transaction isolation levels: **Read Committed** and **Serializable**
PostgreSQL actually has only two transaction isolation levels: **Read Committed** and **Serializable**
Frontend-Backend Communication Wire Protocol
November 12, 2019 in PostgreSQL
Understanding the TCP protocol used for communication between PostgreSQL server and client, and printing messages using Go
Understanding the TCP protocol used for communication between PostgreSQL server and client, and printing messages using Go