The latest from the MySQL community

One of the key factors of a performant MySQL database server is having good memory allocation and utilization, especially when running it in a production environment. But how can you determine if the MySQL utilization is optimized? Is it reasonable to have high memory utilization or does it require fine tuning? What if I come up against a memory leak?

Let's cover these topics and show the things you can check in MySQL to determine traces of high memory utilization.

Memory Allocation in MySQL

Before we delve into the specific subject title, I'll just give a short information about how MySQL uses memory. Memory plays a significant resource for speed and …

Overview The Skinny

In this blog post we explore various options for tuning MySQL traffic routing in the Tungsten Connector for better control of the distribution.

A Tungsten Cluster relies upon the Tungsten Connector to route client requests to the master node or optionally to the slaves. The Connector makes decisions about where to route requests based on a number of factors.

This blog post will focus on the Load Balancer algorithms available via configuration that allow you to adjust the routing behavior of the Connector, along with ways to debug the Connector Load Balancer’s routing decisions.

The Question Recently, a customer asked us:

How do I know which load balancer algorithm is in use by the Connector? And how do we enable debug logging for the Connector load balancer?

In the last blog post of this series, we discussed in detail how Master Key encryption works. In this post, based on what we already know about Master Key encryption, we look into how Master Key rotation works.

The idea behind Master Key rotation is that we want to generate a new Master Key and use this new Master Key to re-encrypt the tablespace key (stored in tablespace’s header).

Let’s remind ourselves what a Master Key encryption header looks like (it is located in tablespace’s header):

From the previous blog post, we know that when a server starts it goes through all encrypted tablespaces’ encryption headers. During that, it remembers the highest KEY ID it read from all the encrypted tablespaces. For instance, if we have three tables with KEY_ID = 3 and one table with KEY ID = 4, it means that …

This talk covers some of the challenges we sought to address by creating a Kubernetes Operator for Percona XtraDB Cluster, as well as a look into the current state of the Operator, a brief demonstration of its capabilities, and a preview of the roadmap for the remainder of the year. Find out how you can deploy a 3-node PXC cluster in under five minutes and handle providing self-service databases on the cloud in a cloud-vendor agnostic way. You’ll have the opportunity to ask the Product Manager questions and provide feedback on what challenges you’d like us to solve in the Kubernetes landscape.

Please join Percona Product Manager Tyler Duzan on Wednesday, February 26, 2020, at 1 pm EST for his webinar “Building a Kubernetes Operator for Percona XtraDB Cluster”.

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We are well aware that ProxySQL is one of the powerful SQL aware proxy for MySQL. The ProxySQL configuration is flexible and the maximum part of configurations can be done with the ProxySQL client itself.

The latest ProxySQL release ( 2.0.9 ) has few impressive features like “SQL injection engine, Firewall whitelist, Config file generate” . In this blog I am going to explain, how to generate the ProxySQL config file using the proxySQL client .

Why configuration file ?

• Backup solution
• Helpful for Ansible deployments in multipul environments

There are two important commands involved in the ProxySQL config file generation.

• Print the config file text in ProxySQL client itself ( like query output )
• Export the configurations in separate file

Print the config file text in ProxySQL client ( like …

How to Deploy MySQL InnoDB Replica Set in Production?

Before i talk about Deployment process of MySQL InnoDB Replica Set , it is more important to know below details:-

• What is MySQL InnoDB Replica Set?
• What is prerequisite and limitation of using MySQL Replica Set?
•  In what kind of scenarios MySQL Replica Set is not recommended.
•  How to configure and deploy MySQL Replica Set- (step by step guide )
• How to use InnoDB Replica Set?
• What if Primary goes down? Does select query re-routed to another server?
• What if Secondary goes down while executing select queries?

§      I will answer these all question in this blog.

   What is Replica Set ?

MySQL InnoDB ReplicaSet a quick and easy way to get MySQL replication(Master-Slave), making it well suited …

This article is written to share how to setup SSL Replication between MySQL InnoDB Cluster and Slave single node via MySQL Router.

It is for Demo Purpose ONLY.

The video below shows the Replication working between Primary Node failover in the MySQL InnoDB Cluster.   The Replication switches to another Primary Node via the MySQL Router.

https://youtu.be/R0jOMfZlF8c

The General Steps as follows :
Setup as follows (Demo only)
Virtual Machine 1
1. A working MySQL InnoDB Cluster

Virutal Machine 2
2. A working MySQL Node as Slave
3. A working MySQL Router setup on Slave Node to point to the MySQL InnoDB Cluser on VM1.


The key part is to ensure the "key files" to be the same on each node of the MySQL InnoDB Cluster.

For the InnoDB Cluster on VM1 setup :
For example with MySQL InnoDB …

In a MySQL master-slave high availability (HA) setup, it is important to continuously monitor the health of the master and slave servers so you can detect potential issues and take corrective actions. In this blog post, we explain some basic health checks you can do on your MySQL master and slave nodes to ensure your setup is healthy. The monitoring program or script must alert the high availability framework in case any of the health checks fails, enabling the high availability framework to take corrective actions in order to ensure service availability.

MySQL Master Server Health Checks

We recommended that your MySQL master monitoring program or scripts runs at frequent intervals. Assuming that the monitoring script is running on the same server as your …

In this post, I am going to show you how to run Orchestrator on FreeBSD. The instructions have been tested in FreeBSD 11.3 but the general steps should apply to other versions as well.

At the time of this writing, Orchestrator doesn’t provide FreeBSD binaries, so we will need to compile it.

Preparing the Environment

The first step is to install the prerequisites. Let’s start by installing git:

[vagrant@freebsd ~]$ sudo pkg update
Updating FreeBSD repository catalogue...
Fetching meta.txz: 100% 944 B 0.9kB/s 00:01
Fetching packagesite.txz: 100% 6 MiB 492.3kB/s 00:13
Processing entries: 100%
FreeBSD repository update completed. 31526 packages processed.
All repositories are up to date.

[vagrant@freebsd ~]$ sudo pkg install git
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
All repositories are up to date.
New …

Presentation of some of the new features of MySQL 8.0.19 released on January 13, 2020.

The post MySQL 8.0.19 New Features Summary first appeared on dasini.net - Diary of a MySQL expert.