Transportable tablespaces were introduced in MySQL 5.6. Using this feature, we can directly copy a tablespace to another server and populate the table with data. This is a very useful feature for large tables. The transportable tablespace mechanism is faster than any other method for exporting and importing tables because the files containing the data just need to be copied to the target location using traditional Linux commands (cp, scp, rsync). Our post MySQL 5.6 Transportable Tablespaces best practices covers the best practices about transportable tablespaces. The feature also supports encrypted tablespaces, and in this article, I am going to explain how to use this feature with them.

Requirements

Below I am sharing my current setup and the requirements.

• I have two servers – s1 and s2. …

Starting a long time ago, we wanted to reproduce workload in a non-production environment, and there were different attempts to achieve that goal (Query Playback is just one of them). But there is another point of view, where you need to write your own workload to do so.

Both Have Pros and Cons

Reproduce Workload:

Pros:

• Simple to implement
• Ready to go

Cons:

• Need to rebuild the environment each time

Custom Scripts:

Pros:

• Possible to have a more realistic workload
• You can reuse the environment
• You can use Sysbench that allows you to change …

Due to CVE-2020-29488, Percona XtraBackup is modifying how xbstream handles absolute paths to prevent malicious file injections. Like the tar archiving utility, the new behavior removes the leading ‘/’ character and references to the parent directory.

Fixes are available in Percona XtraBackup versions:

>= 2.4.22

>= 8.0.23-16.0

For example, ../../../d1/../d2/h.txt will be saved in the stream with the relative path ./d2/h.txt.

The updated function provides a warning when creating a stream with a file with an absolute path:

$ xbstream -c /tmp/data

xbstream: Removing leading '/' from member names

The function also will not extract …

Lately, the number of questions about how to build Percona software has been increased. More and more people try to add their own patches, add some modifications, and build software by themselves. But this raises the question of how to do this in the same way as Percona does, as sometimes the compiler flag can make a drastic impact on the final binary.

First of all, let’s talk about the stages of compiling software.

I would say that at the beginning you need to prepare the build environment, install all the needed dependencies, and so on. For each version, the dependency list would be different. How do you get the correct dependency list? You can get all build requirements from the spec file (on rpm-based systems) or from the control file( on deb-based systems).

The next stage is to get the source code of Percona …

MySQL Shell is the advanced MySQL client, which has many excellent features. In this blog, I am going to explain the MySQL shell commands “\show” and “\watch”. Both commands are very useful to monitor the MySQL process. It provides more insights into the foreground and background threads as well. 

Overview

“\show” and “\watch” are the MySQL shell commands, which can be executed using the Javascript (JS), Python (Py), and SQL interfaces. Both commands are providing the same information, but the difference is you can refresh the results when using the command “\watch”. The refresh interval is two seconds. 

• \show: Run the specified report using the provided options and arguments.
• \watch: Run the specified report using the provided options and arguments, and refresh the results at regular intervals.

Below are the available options you can use with the “\show” …

Point-In-Time Recovery (PITR) for MySQL databases is an important feature that is essential and covers common use cases, like a recovery to the latest possible transaction or roll-back the database to a specific date before some bad query was executed. Percona Kubernetes Operator for Percona XtraDB Cluster (PXC) added support for PITR in version 1.7, and in this blog post we are going to look into the technical details and decisions we made to implement this feature.

Architecture Decisions Store Binary Logs on Object Storage

MySQL uses …

MySQL 5.6.51 is the last release of the MySQL 5.6 series. Oracle will no longer provide updates or security fixes for this version.

Following Percona’s Release Lifecycle policies, the Percona Server for MySQL 5.6 series has reached End of Life (EOL) as well, and we will no longer provide public builds for bugs and security fixes.

We recommend that you upgrade to MySQL 5.7 or Percona Server for MySQL 5.7, or for the latest features, MySQL 8.0 or Percona Server for MySQL 8.0.

Suppose you have not upgraded because you have off-the-shelf applications that also must be upgraded and require 5.6, or you have other …

The goal of this blog post is to explain the various types of transaction isolation levels available in MySQL. After reading the blog, you will be able to explain dirty reads, non-repeatable reads, and the concept of phantom rows as well.

What is the Isolation Level in MySQL?

Isolation (I) is one of the properties from ACID. It defines how each transaction is isolated from other transactions and is a critical component of application design. As per the SQL:1992 standard, InnoDB has four types of Isolation levels. Below, I have listed the types in order, and each transaction isolation level provides better consistency compared to the previous one.

• READ-UNCOMMITTED
• READ-COMMITTED
• REPEATABLE-READ – ( MySQL’s DEFAULT )
• SERIALIZABLE

You can change the isolation level using the variable “transaction_isolation” at runtime. As transaction isolation changes can …

Join Brian Walters and Brandon Fleisher for an interactive discussion around new service and software offerings coming from Percona.

Oracle has decided that MySQL 5.6 will reach its end of life in February 2021. This means there will be no more updates and, more importantly, no more security fixes for discovered vulnerabilities. Yikes! Did you know you have options? Did you know Percona can solve this problem? Tune in to find out how.

Choosing a database-as-a-service (DBaaS) provider can be a daunting challenge. Not ready to move to DBaaS in the public cloud? Or, are you constrained to on-prem deployment due to regulations or other market conditions? Tune-in to learn how Percona is bringing the benefits of simplified DBaaS deployment to the on-prem, private cloud, and hybrid datacenter.

This interactive webinar will be conducted in a roundtable forum style. Bring your interests, bring …

Hi and thanks to all who attended my webinar on Tuesday, January 26th titled Using PMM to Identify & Troubleshoot Problematic MySQL Queries!

Like we do after all our webinars, we compile the list of questions that were answered verbally and also those that were posed yet remained unanswered since we ran out of time during the broadcast.  Before we get to the questions, I wanted to make sure to include a link to the RED Method for MySQL Queries by Peter Zaitsev, Percona’s CEO:

https://grafana.com/grafana/dashboards/12470

Hi Michael, you suggested that table create and update times should be ignored. Surely these values come from information_schema.tables? Does that not reflect what I would see if I …