Database Monitoring Archives - ITFROMZERO

How to Diagnose and Resolve MySQL I/O Bottlenecks Using Performance Schema and sys Schema

By IT From Zero November 2, 2026

A complete guide to diagnosing and fixing MySQL I/O bottlenecks using Performance Schema and sys Schema, pinpointing full table scans and disk-spilling queries.

MySQL

Comprehensive Guide to MySQL Monitoring with Prometheus, Grafana, and mysqld_exporter

By IT From Zero October 31, 2026

A comprehensive guide to building a deep MySQL monitoring system using Prometheus, Grafana, and mysqld_exporter, complete with production-ready configs, optimized PromQL queries, and bottleneck troubleshooting strategies.

Monitoring

Monitoring ClickHouse with Prometheus and Grafana: Query Performance, Mutations, and RAM

By IT From Zero October 19, 2026

A comprehensive guide to leveraging ClickHouse's native OpenMetrics endpoint with Prometheus and Grafana. Master critical PromQL queries to monitor QPS, Part Mutations, and RAM usage to prevent downtime.

Database

Real-time PostgreSQL Monitoring with pg_activity: Kill Hung Queries in a Flash

By IT From Zero August 14, 2026

Don't let slow queries crash your server. Learn how to use pg_activity on Linux for real-time PostgreSQL monitoring, detecting idle in transactions, and handling hung queries quickly.

Database

pg_stat_statements in PostgreSQL: Find and Optimize Resource-Hungry SQL Queries

By IT From Zero June 16, 2026

pg_stat_statements is a PostgreSQL extension that runs in the background and continuously accumulates execution statistics for every SQL statement, letting you pinpoint exactly which queries are consuming the most CPU, I/O, and time. This guide walks through installation, configuration, and practical analysis queries to track down performance bottlenecks in PostgreSQL.

Database

Percona Monitoring and Management (PMM) Setup Guide: Advanced MySQL and PostgreSQL Monitoring

By IT From Zero May 28, 2026

PMM is a tool that gives you deep visibility into MySQL and PostgreSQL performance. This guide covers quick setup and real-world Query Analytics optimization tips.