MySQL is an outstanding database for online transaction processing. With suitable hardware, it is easy to execute more than 1M queries per second and handle tens of thousands of simultaneous connections. Many of the most demanding web applications on the planet are built on MySQL. With capabilities like that, why would MySQL users need anything else?  

Well, analytic queries for starters. Analytic queries answer important business questions like finding the number of unique visitors to a website over time or figuring out how to increase online purchases. They scan large volumes of data and compute aggregates, including sums, averages, and much more complex …

If like me you are an old experienced MySQL DBA, to analyze your MySQL workload, you certainly have used the slow query log with long_query_time set to 0.

The slow query log is a file that contains all the queries whose execution time is greater than the value of long_query_time. This file can be huge and uses up all available disk space on busy systems.

Constantly writing to that file can also add an overhead to the server.

For those reasons, the slow query log is not available in MySQL Database Service (HeatWave) in OCI.

Plan B ?

As a DBA, what are my options for finding the queries that need to be optimized? As usual, the queries that consume the most time are the ones that need some attention

It can be a very long query or a short query executed too many times.

Currently the MySQL DBAs use …

MySQL 8.0.30 was released on 26-07-2022. It has a good list of features.

• Generated Invisible Primary Key
• Dynamic Redo log Sizing
• Instruments to monitor group replication memory
• Support for Ubuntu 22.04

A most notable feature for Database Administrators and database reliability engineers is Dynamic redo logging.

The more widely adopted open-source backup tool is Xtrabackup. The change in the redo log design has affected this hot backup tool.

2022-10-04T18:40:08.211998+05:30 0 [Note] [MY-011825] [Xtrabackup] recognized server arguments: --datadir=/var/lib/mysql 
2022-10-04T18:40:08.212264+05:30 0 [Note] [MY-011825] [Xtrabackup] recognized client arguments: …

Oracle releases updates to MySQL on a quarterly basis and the Release Notes for 8.0.31 arrived just before the software.  This time around there are some very interesting new features that will be handy including SQL standards support, as well as over 130 bug fixes.

The TL;DR:  Some nice new features but nothing spectacular.

• FULL is now a reserved word.
• InnoDB now supports parallel index builds, which improves index build performance. In particular, loading sorted index entries into a B-tree is now multithreaded.
• The OpenSSL library for MySQL Server has been updated to version 1.1.1q.
• The optimizer has been improved so that the old ER_NOT_SUPORTED_YET is not thrown when you try something like this:
  

      ((SELECT a, b, c FROM t ORDER BY a LIMIT 3) ORDER BY b LIMIT 2) ORDER …

As we have Kubernetes installed in part one (see Using Percona Kubernetes Operators With K3s Part 1: Installation), now we will install Percona Server for MySQL Operator into the running cluster.

I will copy some ideas from Peter’s Minukube tutorial (see Exploring MySQL on Kubernetes with Minkube).

In this case, I will use not Percona XtraDB Cluster Operator but a regular Percona Server for MySQL with Asynchronous replication.

We have recently released version 0.3.0 and it is still in the technical preview state, so we are actively looking for more feedback!

If we go with all …

This ProxySQL post is sourced from an error I faced recently ProxySQL has become one of the popular choice as the “proxy” for MySQL databases. This post is tipping you…

The post Can not connect to ProxySQL: reasons and fixtures first appeared on Change Is Inevitable.

Welcome to this week’s OpenLampTech newsletter. I have many great articles curated for you this week. Thank you for reading and please share the publication with others.

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 OpenLampTech issue #47, we are looking at articles covering:

• MySQL Spatial data types
• Build a blog backend with Laravel
• 10 Linux command-line operators
• MySQL row locking
• And much more

Want to support the OpenLampTech publication? Easy enough.

Head on over to …

Statement Digest in MySQL 

https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-digests.html

The parser is also used by the STATEMENT_DIGEST_TEXT() and STATEMENT_DIGEST() functions, which applications can call to compute a normalized statement digest and a digest hash value, respectively, from an SQL statement.

events_statement_summary_by_digest in Performance Schema contains information

…

in this tutorial, We’ll Learn how to fix MySQL ERROR 2002 Can’t connect to local MySQL server through socket ‘/tmp/mysql.sock. Normally, This issue will occur when you connect the MySQL server through the command line, you might encounter a MySQL ERROR 2002 as follows: mysql -uroot -proot ERROR 2002 (HY000): Can’t connect to local MySQL […]

The post ERROR 2002 : Can’t connect to MySQL server through socket appeared first on Phpflow.com.

Let’s continue our journey of deploying the MySQL Database System on OCI with Terraform.
This time we will see how we can use a backup (see [1] and [2]) as a source (initial data) for a new instance.

Within the oci_mysql_mysql_db_system it’s possible to define a source detailing how to provision the initial data of the db system.

Let’s deploy a new MySQL Database Instance using a manual backup we made earlier:

We can also find the backup’s ocid using the oci cli command:

 $ oci mysql backup list …