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Displaying posts with tag: mysql-and-variants (reset)
Webinar January 26: Using Percona Monitoring and Management to Identify and Troubleshoot Problematic MySQL Queries

Join us as Michael Coburn, Percona Product Manager, discusses two methods to identify and troubleshoot problematic MySQL queries using the RED Method and Percona Monitoring and Management (PMM) Query Analytics. He will also highlight specific Dashboards in PMM that visualize the rate, errors, and duration of MySQL events that may be impacting the stability and performance of your database instance.

Please join Michael Coburn, Product Manager, Percona, on Tuesday, January 26th, 2021 at 2:30 pm for his webinar “Using Percona Monitoring and Management to Identify and Troubleshoot Problematic MySQL Queries”.

Watch Recorded Webinar

If you can’t attend, …

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MySQL Group Replication – How to Elect the New Primary Node

In this blog, I am going to explain the different ways of electing the PRIMARY node in MySQL group replication. Before MySQL 8.0.2, primary election was based on the member’s UUID, with the lowest UUID elected as the new primary in the event of a failover.

From MySQL 8.0.2: We can select the node to be promoted as a PRIMARY using the server weight ( group_replication_member_weight ). This can be achieved during the failure of the current primary node.

From MySQL 8.0.12: We can promote any node as a PRIMARY using the function “group_replication_set_as_primary”. This can be set anytime without any failures of nodes.

Scenario:

 I have installed the 3 node group replication cluster. I am using Percona Server for MySQL 8.0.22.

mysql> select …
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Full Read Consistency Within Percona Kubernetes Operator for Percona XtraDB Cluster

The aim of Percona Kubernetes Operator for Percona XtraDB Cluster is to be a special type of controller introduced to simplify complex deployments. The Operator extends the Kubernetes API with custom resources. The Operator solution is using Percona XtraDB Cluster (PXC) behind the hood to provide a highly available, resilient, and scalable MySQL service in the Kubernetes space. 

This solution comes with all the advantages/disadvantages provided by Kubernetes, plus some advantages of its own like the capacity to scale reads on the nodes that are not Primary.

Of course, there are some limitations like the way PXC handles DDLs, which may impact the service, but there is always a cost to pay to get something, expecting to have it all for free is unreasonable.     

In this context, we need to …

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Percona Kubernetes Operator for Percona XtraDB Cluster: HAProxy or ProxySQL?

Percona Kubernetes Operator for Percona XtraDB Cluster comes with two different proxies, HAProxy and ProxySQL. While the initial version was based on ProxySQL, in time, Percona opted to set HAProxy as the default Proxy for the operator, without removing ProxySQL. 

While one of the main points was to guarantee users to have a 1:1 compatibility with vanilla MySQL in the way the operator allows connections, there are also other factors that are involved in the decision to have two proxies. In this article, I will scratch the surface of this why.

Operator Assumptions

When working with the Percona Operator, there are few things to keep in mind:

  • Each deployment has to be seen as a single MySQL service as if a single MySQL instance
  • The technology used to provide the service may change in time …
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Streaming MySQL Backups with Percona XtraBackup – Another Alternative

Today we are going to present you with another way to make a database copy between servers using our Percona XtraBackup utility.  What is the difference with many others existing on the web?  Not many, but they are interesting in terms of performance and availability.

We will combine the xbstream utility with the power of pigz and socat, to take advantage of the multi-processing in the case of having multiple processors, and at the same time, reduce the use of network bandwidth in cases where this component is a bottleneck.  So let’s explain each component:

socat: This stands for SOcket CAT. It is a utility for data transfer between two addresses.

What makes socat so versatile is the fact that an address can represent a network socket, any file descriptor, a Unix domain datagram or stream …

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Updated MySQL OSMetrics Plugins

It has been some time since I have posted updates to my plugins.  After the initial version, I decided to split the plugins into categories of metrics.  This will allow users to choose whether they want to install all of the plugins or only select ones they care about.

Since the installation process is unfamiliar to many users, I also expanded the instructions to make it a little easier to follow.  Moreover, I added a Makefile.

I have also reformatted the output of some plugins to be either horizontal or vertical in orientation.  There is still more work to do in this area as well.

Where to Get The MySQL Plugins

You can get the plugins from GitHub at https://github.com/toritejutsu/osmetrics but they will have to be compiled from source.  As mentioned above, you can choose whether to install all of them or one by …

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TAM Enterprise Experiences – Data Encryption

In previous TAM Enterprise Experiences posts, we have outlined typical aspects of utilizing MySQL in an Enterprise environment. One thing we have not yet covered is the topic of database encryption, both from the standpoint of business requirements as well as some of the more technical aspects of encryption.

In this post, we will cover:

  • Common enterprise compliance requirements
  • Types of MySQL encryption
  • Choosing the right encryption
  • Vault

Common Compliance Requirements

Beyond the obvious security concerns with sensitive data, most enterprise businesses also need to meet various compliance requirements, with the compliance requirement(s) dependent on the country the business is located in, the type of business, and the type of data being stored. Note that in all cases, the onus is on the business to protect the data based on these compliance requirements. Some of …

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Google Cloud Platform: MySQL at Scale with Reliable HA Webinar Q&A

Earlier in November, we had a chance to present the “Google Cloud Platform: MySQL at Scale with Reliable HA.” We discussed different approaches to hosting MySQL in Google Cloud Platform with the available options’ pros and cons. This webinar was recorded and can be viewed here at any time. We had several great questions, which we would like to address and elaborate on the answers given during the webinar.

Q: What is your view on Cloud SQL High Availability in Google Cloud?

A: Google Cloud SQL provides High Availability through regional instances. If your Cloud SQL database is regional, it means that there’s a standby instance in another zone within the same region. Both instances (primary and standby) are kept synced through synchronous replication on the persistent …

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Percona XtraBackup: Introducing Support For Storage Class in xbcloud

A lot of elements take part in a good backup strategy. Two of them are:

  • Where to store your backups – Never on the same server. Preferable not in the same datacenter. Ideally far enough so you can restore in case of a natural disaster (region flood, extended local power outage, etc…).
  • Retention period – The longer, the better.

Those points relate directly to costs. Storing a backup on an off-site facility cost money. Keeping the backups available to fulfill your retention period policy costs money.

The main cloud providers have different layers of storage often called Storage Class. Each layer has its own particularities and policies, but they come with an important factor – Cost!

We are happy to announce that starting at …

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Redesign of –lock-ddl-per-table in Percona XtraBackup

MySQL 5.7, alongside other many improvements, brought bulk load for creating an index (WL#7277 to be specific), which made ADD INDEX operations much faster by disabling redo logging and making the changes directly to tablespace files. This change requires extra care for backup tools. To block DDL statements on an instance, Percona Server for MySQL implemented LOCK TABLES FOR BACKUP. Percona XtraBackup (PXB) uses this lock for the duration of the backup. This lock does not affect DML statements.

MySQL 5.7 doesn’t have an option to block an instance against DDL and to allow all MDL’s. Thus, Percona XtraBackup has also implemented –lock-ddl-per-table. Before we go into other details, let’s understand how –lock-ddl-per-table works up to now:

  1. PXB …
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