First I want to thank everyone who attended my November 16, 2021 webinar “MySQL Performance for DevOps“. Recording and slides are available on the webinar page.

Here are answers to the questions from participants which I was not able to provide during the webinar.

Q: Hi! We have troubles with DELETE queries. We have to remove some data periodically (like, hourly, daily) and we have short-term server stalls during these DELETEs. Server is running on modern NVMe’s so we wonder why do we have this situation. Those DELETE’s are not so large, like 10 000 – 15 000 records, but tables on which DELETE’s are performed update frequently.

A: I would test if a similar

DELETE

  statement is slow when you run it on …

MySQL introduced the MySQL “Upgrade Checker” initially to support upgrades from MySQL 5.7 to 8.0 series. However, the continuous development initiative in the MySQL 8.0 release series has continued this tools usefulness, as it can also report on continuous delivered features throughout the MySQL 8.0 release series. Additionally, “Yes”, bug fixes are always part of that development release… Read More »

The MySQL Development Team is happy to announce a new 8.0 Maintenance Release of MySQL Shell AdminAPI – 8.0.23!

In addition to several bug fixes and minor changes, some significant enhancements regarding monitoring/troubleshooting and performance were included.

MySQL Shell AdminAPI Cluster diagnostics

Checking how a Cluster is running and, whenever the cluster is not 100% healthy, perform troubleshooting tasks is certainly one of the main tasks of a DBA.…

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Editor’s Note: Because our bloggers have lots of useful tips, every now and then we update and bring forward a popular post from the past. Today’s post was originally published on November 26, 2019.

It’s not uncommon these days for us to use a high availability stack for MySQL consisting of Orchestrator, Consul and ProxySQL. You can read more details about this stack by reading Matthias Crauwels’ blog post How to Autoscale ProxySQL in the Cloud as well as Ivan Groenwold’s post on MySQL High Availability With ProxySQL, Consul and Orchestrator. The high-level concept is simply that Orchestrator will monitor the state of the MySQL replication topology and report changes to Consul which in turn can update ProxySQL hosts using …

I’m switching to MySQL and leveraging Alan Beaulieu’s Learning SQL as a supporting reference for my Database Design and Development course. While reviewing Alan’s Chapter 5: Querying Multiple Tables, I found his coverage of using self-joins minimal.

In fact, he adds a prequel_film_id column to the film table in the sakila database and then a single row to demonstrate a minimal self-join query. I wanted to show them how to view a series of rows interconnected by a self-join, like the following:

SELECT   f.title AS film
,        fp.title AS prequel
FROM     film f LEFT JOIN film fp
ON       f.prequel_id = fp.film_id
WHERE    f.series_name = 'Harry Potter'
AND      fp.series_name = 'Harry Potter'
ORDER BY f.series_number;

It returns the following result set:

 …

Here at Pythian we get a lot of exposure to new technologies and implementation strategies via the work we do internally and for our clients. The most noteworthy technology stack that I’ve seen get a lot of traction in the MySQL community recently is the high availability stack including Orchestrator, Consul and ProxySQL. 

I won’t dive too deeply into the details of this implementation as there are several blog posts that our team has submitted on this topic, but the key thing I want you to keep in mind for this particular topic is the usage of Consul as a “source of truth” for the state of your MySQL replication clusters. If Orchestrator or its adjacent scripts are running as expected, Consul should always have the latest information pertaining to the state of your cluster. This is incredibly valuable. In fact, …

If you have a New Relic Infrastructure Pro license, and unmonitored MySQL servers, there’s now an easy solution at your fingertips. With the New Relic MySQL integration you can monitor and graph almost any detailed metric you could possibly want. New Relic recently unified its analytics tools with New Relic One, a dashboard that provides quick access to all the New Relic tools. With an Infrastructure Pro subscription, you get access to:

• New Relic Infrastructure: Flexible, dynamic monitoring of your entire infrastructure, from services running in the cloud or on dedicated hosts, to containers running in orchestrated environments.
• New Relic Alerts: A flexible, centralized notification system that unlocks the operational potential of New Relic. Alerts is a single tool to manage alert policies and alert conditions for all of your New Relic data.
…

As a Database Engineer in Mydbops. We tend to solve multiple complex problems for our esteemed customers. To control the System resources and scale up /down based on needed we are evaluating Dockers and Kubernetes.

Docker is a set of platform as a service products that uses OS-level virtualization to deliver software in packages called Containers. Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels.It’s more lightweight than standard Containers and boots up in seconds.

Docker also is easy to use when you need a simple, single instance. What is great about Docker though is that it allows configuring multiple versions of MySQL.

Docker Installation:

Docker can be installed with yum repository or apt-get repository based on your linux …

MySQL Router is a core component of InnoDB Cluster/ReplicaSet that enables the automatic routing of client traffic to the right instances of your database architecture. Router can automatically adapt to topology changes, however, there are some scenarios on which one would certainly benefit from having the possibility to tag an instance with a certain attribute that indicates a specific behavior change to Router’s default behavior.…

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The MySQL Development Team is happy to announce a new 8.0 Maintenance Release of MySQL Shell AdminAPI – 8.0.21!

As always, we have listened to the growing community of users and introduced a very useful feature for any production deployment of MySQL InnoDB Cluster or ReplicaSet.…

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