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MySQL Feed

Oracle MySQL resources, news, and support articles.

Black-Box Performance Analysis with TCP Traffic

This is a cross-post from the MySQL Performance Blog. I thought it would be interesting to users of PostgreSQL, Redis, Memcached, and $system-of-interest as well.

Black-Box MySQL Performance Analysis with TCP Traffic

For about the past year I’ve been formulating a series of tools and practices that can provide deep insight into system performance simply by looking at TCP packet headers, and when they arrive and depart from a system. This works for MySQL as well as a lot of other types of systems, because it doesn’t require any of the contents of the packet. Thus, it works without knowledge of what the server and client are conversing about.

Percona Server vs MySQL on Intel 320 SSD

If you are terrified by the stability of the results in MySQL in my previous post, I am going to show what we can get with Percona Server. This is also to address the results presented there Benchmarking MariaDB-5.3.4

Some fun with R visualization

My previous post I finished with the graph with unstable results.

There I won’t analyze causes, but rather I want to show some different ways to present results.

I enjoy working with R, and though I am not even close to be proficient in it, I want to share some graphs you can build with R + ggplot2.

Benchmarks of Intel 320 SSD 600GB

I have a chance to test a system with Intel 320 SSD drives (NewRelic provided me with an access to the server), and compare performance with SAS hard drives.

System specification

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?

MySQL monitoring: storing, not caching

I've followed with interest on Baron's Why don’t our new Nagios plugins use caching? and Sheeri's Caching for Monitoring: Timing is Everything. I wish to present my take on this, from mycheckpoint's point of view.

DBD::mysql 4.014 breaks pt-table-checksum 2.0

DBD::mysql 4.014 breaks pt-table-checksum 2.0.  The cause is unknown, but the effect is a lot of errors like:

DBD::mysql::st execute failed: called with 2 bind variables when 6 are needed [for Statement "..." with ParamValues: ...] at ./pt-table-checksum line 7216.

How to recover deleted rows from an InnoDB Tablespace

In my previous post I explained how it could be possible to recover, on some specific cases, a single table from a full backup in order to save time and make the recovery process more straightforward. Now the scenario is worse because we don’t have a backup or the backup restore process doesn’t work. How can I recover deleted rows?

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 database to demonstrate:

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