While the PMM team works hard on our PMM 2.0 release, we have been working on a few things in the background which we’d like to show off !  In particular we have developed a new dashboard that displays metrics related to memory usage on Linux systems. The dashboard leverages information collected by node_exporter. The graphs take advantage of  /proc filesystem files, specifically:

• meminfo: Provides information about distribution and utilization of memory. This varies by architecture and compile options.
• vmstat: Provides information about block IO and CPU activity in addition to memory.

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In the just-released MySQL 8.0.14 I added a feature called LATERAL derived tables.

The manual describes the syntax and has examples of how the feature can be used to find greatest values in tables. In the present post I’m going to consider a different problem solved by LATERAL: let’s say that we have a bunch of nodes, and want to make a “random graph”, by connecting every node to other nodes.…

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As you may have noticed by now, we are continuously improving and enhancing the experience of managing a MySQL server. Furthermore, we have also released tools, such as MySQL shell, that make advanced and distributed setups like creating, deploying, and running clusters of InnoDB instances, seamless to the end user.…

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We are less than 48h before the more and more popular pre-FOSDEM MySQL Day !

Unfortunately one of our speaker won’t be able to deliver his talk. Indeed, Giuseppe had ton cancel is talk on containers (Automating MySQL operations with containers) but he will be present during the day and during the Community Dinner, so if you have questions, I’m sure he will gladly answer them.

So we have replace this great speaker by another great one: Shlomi Noach !

Shlomi will present a very new session: Un-split brain (aka Move Back in Time) MySQL.

Here is the updated …

In a MySQL hosting replication setup, the parameter Seconds_Behind_Master (SBM), as displayed by the SHOW SLAVE STATUS command, is commonly used as an indication of the current replication lag of the slave. In this blog post, we examine how to understand and interpret this value in various situations.

Possible Values of  Seconds Behind Master

The value of SBM, as explained in the  MySQL documentation, depends on the state of the MySQL slave in general, and the states of MySQL slave SQL_THREAD and IO_THREAD in particular. While IO_THREAD connects with the master and reads the updates, SQL_THREAD applies these updates on the slave. Let’s examine the possible values of SBM during different states of the MySQL Slave.

When SBM Value is Null

• SBM is …

I am a Junior DBA at Mydbops. This is my first blog professionally, I would like to brief my encounter with Log-rotate in first few weeks of my work,  Hope it will help other beginners as well. This Blog will cover the following sections.

• Introduction to Log-rotate

• Issues Faced

• Solutions (Fix for the above issues)

• Best practices

  • How to configure the Log-rotate

  • Operation of Log-rotate

  • Files responsible for the Log_rotate utility.

1.0. Introduction to Log-rotate:

• Log-rotate is a utility and …

MySQL InnoDB is more and more popular. The adoption of it is even faster than I expected. Recently, during my travel in Stockholm, Sweden, a customer asked me what was the best practice to backup a cluster.

Since my interlocutor was a customer, the obvious choice is to use MySQL Enterprise Backup (known as MEB). Of course any other physical backup should be also fine.

The customer told me he was using cron to schedule his backup and was only using full backups… That’s perfect. So I told him that there is nothing complicated and that the cron job should something like:

mysqlbackup --with-timestamp --backup-dir /backup  backup

Of course, I do not recommend the use of --user clusteradmin --password=xxxxxin the cronjob but configure your crendentials using …

Percona is glad to announce the release of Percona Server for MySQL 5.6.43-84.3 on January 29, 2019 (Downloads are available here and from the Percona Software Repositories).

This release merges changes of MySQL 5.6.43, including all the bug fixes in it. Percona Server for MySQL 5.6.43-84.3 is now the current GA release in the 5.6 series. All of Percona’s software is open-source and free.

Bugs Fixed

• A sequence of LOCK TABLES FOR BACKUP and STOP SLAVE …

Replication topologies, whether master-slave or group replication setups, may be composed of servers using different MySQL versions.

In MySQL 8.0.14, each transaction’s immediate and original server versions are now visible in the binary log as session variables. These two new variables, fully managed by the replication infrastructure, are used to support cross-version replication by transmitting the MySQL server release numbers associated with each transaction through the replication topology:

• original_server_version stores the MySQL Server release number of the server where a transaction was originally committed (for example, 80014 for a MySQL 8.0.14 server instance).

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Whenever we talk about the scalability of databases its end up with a lot of discussions and effort to implement. Some of you may even argue that it is a bad idea to auto scale the transactional databases. But the pace of innovation in databases — particularly on a world with public cloud, is breathtaking. AWS Aurora is a game changer database engine in DBaaS for Open Source Databases. It provides performance, reliability, availability, and Scalability. With Aurora features like custom endpoints and loadbalancing across replicas, on can explore some interesting use cases. In this post, we will discuss how we solved a customer’s problem by using scalability features of Aurora. We will focus on provisioned Aurora on AWS, not Aurora Serverless.

We have a customer who was doing all the reporting and massive read …