Learning from facepalm moments of a MySQL database restore from Percona Xtrabackup.

The post MySQL database restore issues using xtrabackup – facepalm moments first appeared on Change Is Inevitable.

Proper MySQL Query Optimization starts with a proper Slow Query Logging session. And MySQL Query Optimization is where I spend 70-80% of my time when doing MySQL performance optimization.

In part 2 here, we will go over the pt-query-digest report, that we have prepared in part 1.

Here’s links to the other two parts:

• Advanced MySQL Slow Query Logging Part 1: the essentials
• Advanced MySQL Slow Query Logging Part 3: fine-tuning the logging process

The post Advanced MySQL Slow Query Logging Part 2: …

Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on June 10, 2016. Binaries are available from the downloads area or our software repositories.

Percona XtraDB Cluster 5.6.30-25.16 is now the current release, based on the following:

• Percona Server 5.6.30-76.3
• Galera Replication library 3.16
• Codership wsrep API version 25

…

In this post, I’ll discuss how to run Percona XtraDB Cluster in a multi-host Docker network.

With our release of Percona XtraDB Cluster 5.7 beta, we’ve also decided to provide Docker images for both Percona XtraDB Cluster 5.6 and Percona XtraDB Cluster 5.7.

Starting one node is very easy, and not that different from starting Percona Server image. The only an extra requirement is …

Percona is glad to announce the release of Percona Monitoring and Management 1.0.1 Beta on 10 June, 2016.

Like prior versions, PMM is distributed through Docker Hub and is free to download. Full instructions for download and installation of the server and client are available in the documentation.

Notable changes to the tool include:

• Grafana 3.0
• Replaced custom web server with NGINX
• Eliminated most of the ports for PMM server container (now only two – 9001 and configurable 80)
• Updated to the latest versions of …

Percona is glad to announce the release of Percona XtraDB Cluster 5.7.11-4beta-25.14.2 on June 9, 2016. Binaries are available from the downloads area or our software repositories.

NOTE: This beta release is only available from the testing repository. It is not meant for upgrade from Percona XtraDB Cluster 5.6 and earlier versions. Only a fresh installation is supported.

Percona XtraDB Cluster 5.7.11-4beta-25.14.2 is based on the following:

• …

In this blog post, I’ll discuss how to use MySQL 5.7 Document Store to track data from Internet of Things (IoT) devices.

Using JSON in MySQL 5.7

In my previous blog post, I’ve looked into MySQL 5.7.12 Document Store. This is a brand new feature in MySQL 5.7, and many people are asking when do I need or want to use the JSON or Document Store interface?

Storing data in JSON may be quite useful in some cases, for example:

• You already have a JSON (i.e., from external feeds) and need to store it anyway. Using the JSON datatype will be more convenient and more efficient.
• For the Internet of Things, specifically, when storing events from …

The slides of my talk on best practices to monitor large scale MySQL deployments, are now available for download. This slide was presented during Percona Live 2016.

Monitoring MySQL at scale from Ovais Tariq

Proper MySQL Query Optimization starts with a proper Slow Query Logging session. And MySQL Query Optimization is where I spend 70-80% of my time when doing MySQL performance optimization. In this short series I will show you how to do Slow Query Logging the right way.

Here’s links to the other two parts:

• Advanced MySQL Slow Query Logging Part 2: pt-query-digest report
• Advanced MySQL Slow Query Logging Part 3: fine-tuning the logging process

The post Advanced MySQL Slow Query Logging appeared first on Speedemy.

In this post, we’ll discuss some insight I’ve gained regarding severe performance regression in MySQL 5.7 crash recovery.

Working on different InnoDB log file sizes in my previous post:

What is a big innodb_log_file_size?

I tried to understand how we can make InnoDB crash recovery faster, but found a rather surprising 5.7 crash recovery regression.

Basically, crash recovery in MySQL 5.7 is two times slower, due to this issue: https://bugs.mysql.com/bug.php?id=80788. InnoDB now performs the log scan twice, compared to a single scan in MySQL 5.6 (no surprise that there is performance degradation).

Fortunately, there is a proposed patch for MySQL 5.7, so I hope it will be improved soon.

As for general crash …