Oracle OpenWorld is right around the corner and now is the time to plan your agenda! My Schedule enables you to effectively plan your conference and reserve you seat in sessions. You’ll also get notified of potential updates. Last year we had to turn down folks for a number of MySQL sessions so it does make sense to book your seat in advance...

Go ahead and start by adding the General Session "MySQL’s State of the Dolphin & Customer Experiences" to your agenda now! Rich Mason, General Manager of the MySQL Global Business Unit, and Tomas Ulin, Vice President of MySQL Engineering, will review Oracle’s latest …

pt-table-checksum perfectly solves problem of checking if master and its slaves are in-sync. It answers the question “Are the slaves consistent with the master?”. However if the answer is “No” pt-table-checksum doesn’t actually tell what exactly is different. [crayon-59f9aff300dfa915077909/] pt-table-sync may give a partial answer. It can print SQL statements to sync the replication cluster. Reading the SQL […]

The post Show differences found by pt-table-checksum appeared first on TwinDB.

Since PHP 7.0 has been released there's more attention on scalar types. Keeping types for data from within your application is relatively simple. But when talking to external systems, like a database things aren't always as one eventually might initially expect.

For MySQL the type we see -- in the first approximation -- is defined by the network protocol. The MySQL network protocol by default converts all data into strings. So if we fetch an integer from the database and use PHP 7's typing feature we get an error:

<?php
declare(strict_types=1);

function getInteger() : int {
  $mysqli = new mysqli(...);
  return $mysqli->query("SELECT 1")->fetch_row()[0];
}

var_dump(getInteger());
?>

Fatal error: Uncaught TypeError: Return value of getInteger() must be of the type integer, string returned in t.php:6

Of course the solution is easy: Either we cast ourselves or we disable the strict mode and PHP will …

In this blog, I will provide answers to the Q & A for the InnoDB Troubleshooting webinar.

First, I want to thank everybody for attending the August 11 webinar. The recording and slides for the webinar are available here. Below is the list of your questions that I wasn’t able to answer during the webinar, with responses:

Q: What’s a good speed for buffer pool speed/size for maximum query performance?

A: I am sorry, I don’t quite understand the question. InnoDB buffer pool is an in-memory buffer. In an ideal case, your whole active dataset (rows that are accessed by application regularly) should be in the buffer pool. There is a good …

MHA (Master High Availability Manager and tools for MySQL) is one of the most important pieces of our managed services. When properly set up, it can check replication health, move writer and reader virtual IPs, perform failovers, and have its output constantly monitored by Nagios. Is it easy to deploy and follows the KISS (Keep It Simple, Stupid) philosophy that I love so much.

This blog post is a quick start guide to try it out and play with it in your own testing environment. I assume that you already know how to install software, deal with SSH keys and setup replication in MySQL. The post just covers MHA configuration.

Testing environment

Taken from /etc/hosts

192.168.1.116      mysql-server1
192.168.1.117   mysql-server2
192.168.1.118   mysql-server3
192.168.1.119   mha-manager

mysql-server1: Our master MySQL …

Introduction

This is part four of a five part blog series to explore InnoDB internals by looking at the related tunable system variables. In this section we’re going to explore the mechanics that impact CPU resourcing and how InnoDB handles concurrent threads. You’ll notice that a lot of the variables covered in section relate to features that are now disabled but were a lot more prevalent in previous versions of MySQL, particularly those that were released at a time where system context switching had a greater cost than it does today. These variables are still worth discussing as you may run into older systems that utilize these mechanics, and there are even modern systems I’ve worked with that have implemented these features to tune performance to its highest potential.

Just like previous sections, I would like to emphasize something that was written in part one of this blog post series.

“I should note that …

Here’s the behind-the-scenes story about how Uber Engineering’s Driver Team continues to develop our virtual onboarding funnel to get hundreds of thousands of driver-partners on the road earning money with Uber.

The Consequences of Scale for Driver-Partners

Our team cares …

The post How Uber Engineering Massively Scaled Global Driver Onboarding appeared first on Uber Engineering Blog.

Welcome to a new Percona Live Europe featured talk with Percona Live Europe 2016: Amsterdam speakers! In this series of blogs, we’ll highlight some of the speakers that will be at this year’s conference. We’ll also discuss the technologies and outlooks of the speakers themselves. Make sure to read to the end to get a special Percona Live Europe registration bonus!

In this Percona Live Europe featured talk, we’ll meet Manyi Lu, Director Software Development at Oracle. Her talk will be on MySQL 8.0: what’s new in Optimizer. There are substantial improvements in the optimizer in MySQL 5.7 and MySQL 8.0. Most noticeably, users can now combine …

The MariaDB project is pleased to announce the immediate availability of MariaDB Connector/J 1.5.2 Stable (GA). This is the first stable release in the MariaDB Connector/J 1.5 series and includes several new features including a native SSPI Windows implementation, support for TLSv1.1 and TLSv1.2, Aurora host auto-discovery, “LOAD DATA INFILE” interceptors, performance improvements, bug fixes, […]

The post MariaDB Connector/J 1.5.2 now available appeared first on MariaDB.org.

Welcome to this week’s Planets9s, covering all the latest resources and technologies we create around automation and management of open source database infrastructures.