In a previous blog, I discussed how to pull, install and run MySQL 8.0 with Docker.  I showed how to connect to the Docker daemon with MySQL.

Now I will show you how to connect to the same Docker instance using the MySQL Shell which is a tool to use Document Store and to create InnoDB Clusters.

Installing Docker, Starting MySQL, and Connecting using MySQL Shell

First, you grab Docker: https://docs.docker.com/install .

Then, you pull and run MySQL 8.0 (Linux) by running the following.  Note that I’m not using a password which is just for testing a fleeting MySQL Docker container:

$ docker run –name mysql8 -e MYSQL_ALLOW_EMPTY_PASSWORD=yes -d mysql/mysql-server

Unable to find image ‘mysql/mysql-server:latest’ locally

…

Pull complete

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The Call For Papers  for the next Southern California Linux Expo aka SCaLE is open and I need your help with the MySQL Track.  We have had a MySQL track for the past few years and this year I have gotten permission from the organizers of SCaLE to get a group of MySQL community members to review the talks for this track.  This year was pretty good but to make 2019 even better we need more submissions from more people AND THIS MEANS YOU!!

The link above has the details on how to register to submit a talk submission and the process is fairly simple.  But if you would like help with your submission, want to 'rubber duck' ideas, or want a quick review before you submission please contact me  (@stoker, david.stokes @ Oracle.com) or find me at a show.

So what type of talks do we need?  We need to cover material …

This release has been superseded by 5.7.23-31.31.2 after a critical regression was found. Please update to the latest release.

Percona is glad to announce the release of Percona XtraDB Cluster 5.7.23-31.31 on September 26, 2018. Binaries are available from the downloads section or from our software repositories.

Percona XtraDB Cluster 5.7.23-31.31 is now the current release, based on the following:

• Percona Server for MySQL 5.7.23
…

Thanks for joining us this week for our webinar on monitoring MySQL, MariaDB, PostgreSQL and MongoDB with freely available community tools and more specifically one: ClusterControl Community Edition. The replay and slides are now available to watch on our website.

Monitoring is essential for operations teams to ensure that databases are up and running. However, as databases are increasingly being deployed in distributed topologies based on replication or clustering, what does it mean to our monitoring infrastructure? Is it ok to monitor individual components of a database cluster, or do we need a more holistic systems approach? Can we rely on SELECT 1 as health check when determining whether a …

In a DBA’s day to day activities, we are doing Archive operation on our transnational database servers to improve your queries and control the Disk space. The archive is a most expensive operation since its involved a huge number of Read and Write will be performed. So its mandatory to run the archive queries in …

The post Archive MySQL Data In Chunks Using Stored Procedure appeared first on SQLgossip.

In a DBA’s day to day activities, we are doing Archive operation on our transnational database servers to improve your queries and control the Disk space. The archive is a most expensive operation since its involved a huge number of Read and Write will be performed. So its mandatory to run the archive queries in chunks. The archive is depended on business use. Many of us need a copy of the data on an archive database to refer later. To perform the archive we can just simply run the delete query with the limit. But we need to run the query again and again until the matched rows count is 0. We can create a procedure to do this in a while loop. I have created one such procedure to archive many tables. 

Image Source: Brent Ozar Unlimited

Why Archive is an expensive operation? 

Generally how we are arching the data is *delete from table_name where column_name <= some_value;* If you …

This post is a followup to my previous article https://www.percona.com/blog/2018/08/29/scaling-io-bound-workloads-mysql-cloud/

In this instance, I want to show the data in different dimensions, primarily to answer questions around how throughput scales with increasing IOPS.

A recap: for the test I use Amazon instances and Amazon gp2 and io1 volumes. In addition to the original post, I also tested two gpl2 volumes combined in software RAID0. I did this for the following reason: Amazon cap the single gp2 volume throughput to 160MB/sec, and as we will see from the charts, this limits InnoDB performance.

Also, a reminder from the previous post: we can increase gp2 IOPS by increasing volume size (to the top limit 10000 IOPS), and for io1 we can increase IOPS by paying per additional IOPS.

Scaling with InnoDB …

A query plan uses loose index scan if “Using index for group-by” appears in the “Extra”  column of the EXPLAIN output. In some plans though, “Using index for group-by (scanning)” appears. What does “(scanning)” mean and how is it different from the regular loose index scan?…

Continuent Clustering support true distributed multimaster clustering. In this topology, there are cross-site replicator services for each remote site. In a 3-site configuration, there are a total of 9 replication streams to manage.

Continuent Clustering also offers a graphical administration tool called the Tungsten Dashboard to help with your management burden. The GUI makes the deployment much easier to visualize and administer.

For our example, we will have a Composite Multimaster dataservice called global with three active, writable member clusters (one per site), east, west and north.

Dashboard Summary View

In the summary, collapsed view, the composite service and all member clusters are listed with associated information and controls. Note that the Type for the composite dataservice global is CompMM …

When I worked at Borland on InterBase (one of the first MVCC relational databases), the saxophone-playing founder of Borland, Philippe Kahn, would talk about the ‘forehead install’ at nearly every meeting that I attended. Installs should be easy, he would say. As easy as hitting your forehead to the space bar. In fact, Kahn claimed that installing software with another product “could be equivalent to a heart transplant”.

Although MySQL installs are not complex, there is one tool that can make installs and test driving new software more palatable – Docker.

There are two advantages of testing MySQL 8.0 with Docker: (1) installing and starting MySQL 8.0 is even simplier with Docker and (2) changing my.cnf values with the SET PERSIST option can also help you navigate the Docker environment.

Installing Docker, Starting MySQL, and Connecting to MySQL

First, you grab Docker:  …