At work, I am in an ongoing discussion with a number of people on the Observability of Outliers. It started with the age-old question “How do I find slow queries in my application?” aka “What would I want from tooling to get that data and where should that tooling sit?”

As a developer, I just want to automatically identify and isolate slow queries!

Where I work, we do have SolarWinds Database Performance Monitor aka Vividcortex to find slow queries, so that helps. But that collects data at the database, which means you get to see slow queries, but maybe not application context.

There is also work done by a few developers which instead collects query strings, query execution times and query counts at the application. This has access to the call stack, so it can tell you which code generated the query that was slow.

It …

Now available on demand: Watch the Continuent Tungsten MySQL Use Case Webinar Series for 2020 with Eero Teerikorpi, Founder & CEO of Continuent.

Tags:  MySQL tungsten clustering Webinar use case High Availability data protection geo-scale geo-distributed …

All together now

Let’s now put together all that we’ve learned in InnoDB Data Locking – Part 2 “Locks” about table and record locks to understand following situation:

mysql> BEGIN;
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT * FROM t FOR SHARE;
+----+
| id |
+----+
|  5 |
| 10 |
| 42 |
+----+
3 rows in set (0.00 sec)

mysql> DELETE FROM t WHERE id=10;
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO t VALUES (4);
Query OK, 1 row affected (0.00 sec)

mysql> SELECT INDEX_NAME,LOCK_TYPE,LOCK_DATA,LOCK_MODE
       FROM performance_schema.data_locks

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Oracle Live.

On Wednesday, December 2, the world’s most popular open source database takes a leap forward in the cloud. Edward Screven, Oracle’s chief corporate architect, will share MySQL innovation that enables you to reduce cost and complexity while accelerating business insights. 

We have really exciting news for MySQL users, including some amazing testimonials from early adopters who will share their experiences. And, yes of course, there will be benchmarks!

Join us on this very special day in the history of MySQL. Watch the live event, and following the announcement, join us for a conversation in a live Q&A with MySQL product experts. 

Don’t miss this major announcement.   …

Oracle Live. On Wednesday, December 2, the world’s most popular open source database takes a leap forward in the cloud. Edward Screven, Oracle’s chief corporate architect, will share MySQL innovation that enables you to reduce cost and complexity while accelerating business insights. We have really ...

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:

 …

MySQL highly available solutions, InnoDB Cluster (it uses InnoDB storage engine and is based on Group Replication plugin) and NDB Cluster (NDB storage engine), offer high scalability and redundant topologies.

• InnoDB Cluster can be configured with up to 9 replicas, in single primary configuration or multi-primary.
• NDB Cluster instead, while being a much different solution, offers the chance to have …

Whenever application security is mentioned, people think of securing applications against some of the most frequent attacks such as injection, broken authentication, sensitive data exposure, and the like. However, while these attacks are prevalent, knowing how to protect your application from them alone will not be sufficient - especially when you’re running MySQL. Today we are going to look at a different side of security - we are going to look into how to properly secure MySQL.

As MySQL security is a pretty big thing, treat this post as the start of a series of posts regarding MySQL security measures. We will not cover everything, but this post should provide the foundation of some of MySQL’s security measures.

Why Do You Need to Secure MySQL? …

The MySQL team is excited to announce that MySQL Database Service now supports the Oracle Cloud Infrastructure Compute E3 shapes. These shapes are built on the 2nd Gen AMD EPYC 7742 processor, with a base clock frequency of 2.25 GHz and max boost of up to 3.4 GHz, and have better networking and more RAM. MySQL Database Service customers can start to use them today and enjoy higher performance and flexibility for diverse MySQL workloads.

The MySQL Database Service E3 offers up to 64 OCPUs (128 virtual cores) and 1 TB of RAM. This is the highest core count and memory for a single fully managed MySQL instance on any public cloud.

The new E3 shapes for MySQL Database Service are available in eight commercial regions: Brazil East (Sao Paulo), Canada Southeast (Toronto), Germany Central (Frankfurt), India West (Mumbai), Japan East (Tokyo), UK South (London), …

The MySQL team is excited to announce that MySQL Database Service now supports the Oracle Cloud Infrastructure Compute E3 shapes. These shapes are built on the 2nd Gen AMD EPYC 7742 processor, with a base clock frequency of 2.25 GHz and max boost of up to 3.4 GHz, and have better networking and more...