When Index Condition Pushdown is used, you cannot trust rows examined as reported by the slow query log (nor in some Performance Schema tables) and you cannot trust the global status Innodb_rows_read (nor the InnoDB Metrics dml_reads).  These can lead to an incorrect query complexity analysis, to a mistaken estimation of the total load of a MySQL server, and to a lot of wasted time.&

Honestly, if no one ever read the OpenLampTech newsletter, that’s fine because I always do! Hey everyone, here is your dose of PHP/MySQL content to help you learn, grow, and maintain your sanity for the week. Enjoy!

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The Newsletter for PHP and MySQL Developers

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When using cloud native application architectures, Functions have an important role for the business logic without managing any infrastructure. Functions is a serverless platform powered by the Fn Project open source engine.

These Functions are mostly used to create and run different tasks. They can be executed using Fn Project CLI, OCI CLI or a HTTP request.

HTTP requests are useful to invoke Functions from a different service. Usually use to schedule the execution of the function according to a time schedule. Currently, Oracle Cloud Infrastructure does not provide a native mechanism to create time based schedules to execute some jobs like invoking a Function directly …

I’ve been publishing more articles outside of the OpenLampTech newsletter, directly to the Substack page. In this post, I’m sharing a recent post featuring one of my favorite SQL books…

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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 …

Supercharge your productivity in MySQL Workbench with these ‘click and paste’ SQL code snippets available for any table in a schema. Continue reading and see the ‘Staple Five‘…

Do you need to learn MySQL? Just starting and confused about how to query a table and get the data you need? I am creating premium MySQL Beginners content for this specific reason. To help those who want to learn the basics of MySQL but don’t know where to start. Learn more about the premium blog posts as I develop and release them.

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If you enjoy the content written here, by all means, share this blog and your favorite post(s) with others who may benefit from or like it as well. Since coffee is my favorite drink, you can even buy me …

 MDS-Heatwave Data Analysis using ZeppelinThe Complete Guide to access MDS with HeatWave by Zeppelin

In this guide we will walk through how to install and access MDS with Heatwave.

1.       What is MDS and HeatWave ?

2.       What is Zeppelin  ?

3.       Environment details

4.       How to Install Zeppelin ?

5.       Network Consideration

6.       How to access HeatWave

7.       MDS Data Analysis using Zeppelin

8.       Conclusion

Overview of Zeppelin and MySQL Database Service with HeatWave

A little bit ago, I released a blog post comparing the backup performance of different MySQL tools such as mysqldump, the MySQL Shell feature called Instance Dump, mysqlpump, mydumper, and Percona XtraBackup. You can find the first analysis here:

Backup Performance Comparison: mysqldump vs. MySQL Shell Utilities vs. mydumper vs. mysqlpump vs. XtraBackup …

Sit back, grab your beverage of choice, and get ready for a deep-dive issue of OpenLampTech, the newsletter for PHP/MySQL developers. This month’s featured piece covers select-like methods in the CodeIgniter 4 Query Builder class. Thanks for being here to read the publication

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.

Take your time with this week’s issue of the OpenLampTech featured piece.

There is original and curated content …

As of MySQL 8.0.18, EXPLAIN ANALYZE is an indispensable tool for understanding query execution because it breaks down the query execution stage of response time by measuring each step of the query execution plan. The information is illuminating, but the output is not intuitive: it requires practice and some understanding of how MySQL executes queries beyond the table join order shown by traditional EXPLAIN output. This blog post closely examines three different examples of EXPLAIN ANALYZE output.

As of MySQL 8.0.18, EXPLAIN ANALYZE is an indispensable tool for understanding query execution because it breaks down the query execution stage of response time by measuring each step of the query execution plan. The information is illuminating, but the output is not intuitive: it requires practice and some understanding of how MySQL executes queries beyond the table join order shown by traditional EXPLAIN output. This blog post closely examines three different examples of EXPLAIN ANALYZE output.