October 25, 2014

How to Monitor MySQL with Percona’s Nagios Plugins

In this post, I’ll cover the new MySQL monitoring plugins we created for Nagios, and explain their features and intended purpose. I want to add a little context. What problem were we trying to solve with these plugins? Why yet another set of MySQL monitoring plugins? The typical problem with Nagios monitoring (and indeed with […]

How to convert MySQL’s SHOW PROFILES into a real profile

SHOW PROFILES shows how much time MySQL spends in various phases of query execution, but it isn’t a full-featured profile. By that, I mean that it doesn’t show similar phases aggregated together, doesn’t sort them by worst-first, and doesn’t show the relative amount of time consumed. I’ll profile the “nicer_but_slower_film_list” included with the Sakila sample […]

Why don’t our new Nagios plugins use caching?

In response to the release of our new MySQL monitoring plugins on Friday, one commenter asked why the new Nagios plugins don’t use caching. It’s worth answering in a post rather than a comment, because there is an important principle that needs to be understood to monitor servers correctly. But first, some history. When I […]

Announcing MySQL Monitoring Plugins from Percona

We’ve released a new set of monitoring plugins for MySQL servers and related software. With these plugins, you can set up world-class graphing and monitoring for your MySQL servers, using your own on-premises Cacti and Nagios software. The Cacti plugins are derived from an existing set of templates we’ve been using for several years, but […]

Optimize Your SQL With Percona’s Online Query Advisor!

Wouldn’t it be nice if you could get expert advice on your SQL queries to find problems in them, the same way that programmers can use lint-check tools to warn about bugs in their C?

Such a simple mistake, but it’s the kind of thing that James Bond movies are made of, isn’t it? […]

Why not make a tool to improve existing configurations?

A couple of users of our very popular MySQL Configuration Wizard have submitted feedback such as “I’d love to input my existing server settings and get suggestions on how to improve it.” This sounds like it would be great, doesn’t it? We’ve considered doing this, and even partially implemented it. But during our pre-release testing, […]

Dot-Org Pavilion at the Percona Live MySQL Conference

This is a cross-post from my personal blog. Are you involved with an open-source project that’s interesting to MySQL users, such as Nginx, PHPMyAdmin, Drupal, Jenkins, PHP, and so on? Percona just published the application form for dot-org groups to have a free expo hall booth in the Percona Live MySQL Conference in April. Please […]

Announcing Percona Toolkit Release 2.0.3

We’ve released Percona Toolkit 2.0.3, with a couple of major improvements and many minor ones. You can download it, read the documentation, and get support for it. What’s new? You can read the changelog for the details, but here are the highlights: Brand new pt-diskstats, thanks to Brian Fraser. This tool is completely rewritten, and […]

Verifying backup integrity with CHECK TABLES

An attendee to Espen’s recent webinar asked how to check tables for corruption. This kind of ties into my recent post on InnoDB’s handling of corrupted pages, because the best way to check for corruption is with CHECK TABLES, but if a page is corrupt, InnoDB will crash the server to prevent access to the […]

MySQL Configuration Wizard Updated

We’ve released an updated version of the MySQL Configuration Wizard we announced at the end of last year. If you don’t remember that announcement, here’s the short version: this is a tool to help you generate my.cnf files based on your server’s hardware and other characteristics. We’ve gotten really good feedback on this tool, including […]