I’ve been publishing paywall content over on my Kofi Page for the “MySQL Learning Tier” membership mostly in video format. Here is a free post for anyone interested in the type of content you can expect within the membership…

The Newsletter for PHP and MySQL Developers

Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.

Image by Steve Buissinne from  …

The MySQL April 2022 releases are now available.

Ready for your weekly dose of PHP/MySQL content? Well, you’re in luck because this issue of OpenLampTech has just what you need!

The Newsletter for PHP and MySQL Developers

Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.

In this week’s OpenLampTech issue #23, we are looking at articles on:

• WordPress WP_Query
• MySQL Deferred Joins
• Modern PHP
• MySQL data change capture
• Custom WordPress taxonomies
• And, a whole lot more…

…

Percona Live's schedule has very interesting MySQL talks.  This is an in person event in Austin Texas and one of the rooms will be livestreamed.  Please note there are TWO rooms to chose from.

Room 1 

 Tuesday, May 17

 
11:30am CDTUsing Roles and Partial Revokes To Improve Security in MySQL 8.0
1:30pm CDTRocksDB Performance and Reliability Practices
2:30pm CDT …

In the last quarter of 2021, AWS released Aurora version 3. This new version aligns Aurora with the latest MySQL 8 version, porting many of the advantages MySQL 8 has over previous versions.

While this brings a lot of new interesting features for Aurora, what we are going to cover here is to see how DDLs behave when using the ONLINE option. With a quick comparison with what happens in MySQL 8 standard and with Group Replication.

Tests

All tests were run on an Aurora instance r6g.large with a secondary availability zone. The test was composed of:

        Four connections

• • #1 to perform DDL
  • #2 to perform insert data in the table I am altering
  • #3 to perform insert data on a different table 
  • #4 checking the other node operations

In the Aurora instance, a …

Last quarter of 2021 AWS released Aurora version 3. This new version aligns Aurora with the latest MySQL 8 version porting many of the advantages MySQL 8 has over previous versions.

While this brings a lot of new interesting features for Aurora, what we are going to cover here is to see how DDLs behave when using the ONLINE option. With a quick comparison with what happens in MySQL 8 standard and with Group Replication. 

Tests

All tests were run on an Aurora instance r6g.large with secondary availability zone.
The test was composed by:

        4 connections

• • #1 to perform ddl
  • #2 to perform insert data in the table I am altering
  • #3 to perform insert data on a different table 
  • #4 checking the other node operations

In the Aurora instance, a sysbench …

Last quarter of 2021 AWS released Aurora version 3. This new version aligns Aurora with the latest MySQL 8 version porting many of the advantages MySQL 8 has over previous versions.

While this brings a lot of new interesting features for Aurora, what we are going to cover here is to see how DDLs behave when using the ONLINE option. With a quick comparison with what happens in MySQL 8 standard and with Group Replication. 

Tests

All tests were run on an Aurora instance r6g.large with secondary availability zone.
The test was composed by:

        4 connections

• • #1 to perform ddl
  • #2 to perform insert data in the table I am altering
  • #3 to perform insert data on a different table 
  • #4 checking the other node operations

In the Aurora instance, a sysbench …

When one is responsible for promoting application development from Dev through the various environments such as QA, UAT, etc., through Production, it is often useful to ensure that configurations in test environments are comparable to the final production environment.  This is especially true with systems where a team of DBAs manage the servers.

Obviously, the difference in performance could be due to differences in hardware, storage, networking, software configuration, etc.  The question is how does one quickly and efficiently find the differences without having to run a lot of different commands and compare the output.  Fortunately, our Percona Toolkit has a couple of utilities that can make this much easier.  When you are tasked with supporting large numbers of servers, efficiency is paramount and this is where the toolkit can really help you!

You can find more information on the Percona Toolkit here: …

As a best practice before dropping a large table in MySQL, pt-archiver can be used to delete all the records in batches. This helps to avoid a situation where your server may get stalled under certain circumstances.

I recently read a comment from a user saying “The pt-archiver is not working as expected! It is skipping the last record, which seems like a bug.”. Let’s examine pt-archiver’s default behavior and understand why the author of this comment believes that pt-archiver is bugged (Spoiler: It’s not!).

But wait, before continuing on busting the blame, let me clarify why to use pt-archiver before dropping large tables.

When we drop a table in MySQL:

• Table data/index (ibd) and definition (frm) files are removed.
• Triggers are removed.
• Table definition cache is updated by removing the table being dropped.
• InnoDB buffer pool is scanned for associated pages to …

Recently we saw how we can catch audit information using invisible column, JSON data type and triggers in MySQL 8.0:

• Poorman’s MySQL table audit information
• Poorman’s MySQL table audit information – part 2

Of course, the creation of these triggers can quickly become a tedious operation. Once again, MySQL has all what we need to make it simple.

As you may know, it’s impossible to create triggers from store procedure, so using a sys schema function would not be something possible. However, MySQL Shell is again the answer ! It’s very easy to use a python plugin to perform the necessary operations.

I’ve written such example, available on …