MySQL InnoDB Cluster is an Oracle High Availability solution that can be easily installed over MySQL to provide high availability with multi-master capabilities and automatic failover. In the previous post we presented the first component of InnoDB Cluster, group replication. Now we will go through the second component, MySQL Router.  We will address MySQL Shell in a final instalment of this three-part series. By then, you should have a good overview of the features offeed by MySQL InnoDB Cluster.

MySQL Router

This component is responsible for distributing the traffic between members of the cluster. It is a proxy-like solution to hide cluster topology from applications, so applications don’t …

Amazon RDS Aurora (MySQL) provides its own low latency replication. Nevertheless, there are cases where it can be beneficial to set up replication from Aurora to an external MySQL server, as Amazon RDS Aurora is based on MySQL and supports native MySQL replication. Here are some examples of when replicating from Amazon RDS Aurora to an external MySQL server can make good sense:

• Replicating to another cloud or datacenter (for added redundancy)
• Need to use an independent reporting slave
• Need to have an additional physical backup
• Need to use another MySQL flavor or fork
• Need to failover to another cloud and back

In this blog post I will share simple step by step instructions on how to do it.

Steps to setup MySQL replication from AWS RDS Aurora to MySQL server

1. Enable binary logs in the option group in Aurora (Binlog format = mixed). This will …

In this post we will review the most important Linux settings to adjust for performance tuning and optimization of a MySQL database server. We’ll note how some of the Linux parameter settings used OS tuning may vary according to different system types: physical, virtual or cloud. Other posts have addressed MySQL parameters, like Alexander’s blog MySQL 5.7 Performance Tuning Immediately After Installation. That post remains highly relevant for the latest versions of MySQL, 5.7 and 8.0. Here we will focus more on the Linux operating system parameters that can affect database performance.

Server and Operating System

Here are some Linux parameters that you should check and consider modifying if you need to improve database performance.

…

Please join Percona’s Chief Evangelist Colin Charles on Thursday, June 28th, 2018, as he presents Securing Database Servers From External attacks at 7:00 AM PDT (UTC-7) / 10:00 AM EDT (UTC-4).

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A critical piece of your infrastructure is the database tier, yet people don’t pay enough attention to it judging by how many are bitten via poorly chosen defaults, or just a lack understanding of running a secure database tier. In this talk, I’ll focus on MySQL/MariaDB, PostgreSQL, and MongoDB, and cover external authentication, auditing, encryption, SSL, firewalls, replication, and more gems from over a decade of consulting in this space from Percona’s 4,000+ …

Please join Percona’s Principal Support Escalation Specialist Sveta Smirnova as she presents Troubleshooting Best Practices: Monitoring the Production Database Without Killing Performance on Wednesday, June 27th at 11:00 AM PDT (UTC-7) / 2:00 PM EDT (UTC-4).

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During the MySQL Troubleshooting webinar series, I covered many monitoring and logging tools such as:

• General, slow, audit, binary, error log files
• Performance Schema
• Information Schema
• System …

Please join Percona’s MySQL Database Administrator, Brad Mickel as he presents How to Analyze and Tune MySQL Queries for Better Performance on Thursday, June 21st, 2018, at 10:00 AM PDT (UTC-7) / 1:00 PM EDT (UTC-4).

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Query performance is essential in making any application successful. In order to finely tune your queries you first need to understand how MySQL executes them, and what tools are available to help identify problems.

In this session you will learn:

1. The common tools for researching problem queries
2. What an Index is, and why you should use one
3. Index limitations
4. When to rewrite the …

Since MySQL 5.7.5, we have been able to resize dynamically the InnoDB Buffer Pool. This new feature also introduced a new variable — innodb_buffer_pool_chunk_size — which defines the chunk size by which the buffer pool is enlarged or reduced. This variable is not dynamic and if it is incorrectly configured, could lead to undesired situations.

Let’s see first how innodb_buffer_pool_size , innodb_buffer_pool_instances  and innodb_buffer_pool_chunk_size interact:

The buffer pool can hold several instances and each instance is divided into chunks. There is some information that we need to take into account: the number of instances can go from 1 to 64 and the total amount of chunks should not exceed 1000.

So, for a server with 3GB RAM, a buffer pool of 2GB with 8 instances and chunks at default value (128MB) we are going to get 2 chunks per instance:

This means that there will be 16 chunks.

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At my latest webinar “MySQL Test Framework (MTR) for Troubleshooting”, I received an interesting question about MTR test cases for Percona XtraDB Cluster (PXC). Particularly about testing SST and IST.

This post is intended to answer this question. It assumes you are familiar with MTR and can write tests for MySQL servers. If you are not, please watch the webinar recording first.

You can find example tests in any PXC tarball package. They are located in directories

mysql-test/suite/galera

 ,

mysql-test/suite/galera_3nodes

  and

mysql-test/suite/wsrep

 , though that last directory only contains a configuration file.

If you …

Please join Percona’s Principal Architect Alex Rubin as he presents MySQL, Percona XtraDB Cluster, ProxySQL, Kubernetes: How they work together to give you a highly available cluster database environment on Tuesday, May 29th at 7:00 AM PDT (UTC-7) / 10:00 AM EDT (UTC-4).

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In this webinar, Alex will discuss how to deploy a highly available MySQL database environment on Kubernetes/Openshift using …

Some years ago, Peter Z wrote a blogpost about using MySQL Sandbox to deploy multiple server versions. Last February, Giuseppe  introduced us to its successor: dbdeployer. In this blogpost we will demonstrate how to use it. There is a lot of information in Giuseppe’s post, so head there if you want a deeper dive.

First step is to install it, which is really easy to do now since it’s developed in Go, and standalone executables are provided. You can get the latest version …