A long long time ago (in a galaxy far away… cue the music!) MySQL added support for an authentication plugin which is now known as mysql_native_password. The mysql_native_password plugin uses SHA1 hash to

• Store the password(SHA1(SHA1(password)) in mysql.user table
• Authenticate user

One of the good traits of this plugin is that it allows authentication using …

The RED Method (Rate, Errors, Duration) is one of the more popular performance monitoring approaches.  It is often applied to Monitoring Microservices though there is nothing that prevents it from being applied to databases like MySQL.

In Percona Monitoring and Management (PMM) v2 we have all the required information stored in the ClickHouse database, and with the built-in ClickHouse datasource it is a matter of creating a dashboard to visualize the data.

While I was editing the dashboard, I added a few other panels, beyond what RED Method requires, in order to show some of the cool things you can do with Grafana + ClickHouse data source and …

If you write MySQL queries, at some point you are going to have to provide query results in a specific order. To impose any ordering in MySQL (this applies to SQL overall and is not directed only at MySQL), you have to use the ORDER BY clause. Without it, there is no guaranteed order. The database is free to send back query results in any order. As I learn PHP, I make it a point to explore both the MySQL side, along with the PHP side in regards to similar type tasks and the efficiency of each. So far in my PHP journey, I have found that arrays are used quite extensively. In this post, I’ll cover array_multisort() – one of many in-built PHP functions – used for sorting arrays. In the context of the example data for this post, the arrays are populated by an unordered MySQL query. Let’s see one example of how you can establish a sorting order in a PHP …

How can I Disable MySQL Audit Log while Server is running?

You can turn off MySQL Enterprise Audit Log without restart of MySQL , sometimes we wanted to turn off auditing to test some functionalities in database.

If you wanted to revise about 5 W (what ,why ,where,when,who) about MySQL Enterprise Audit please have a look on my previous blog.

https://mysqlsolutionsarchitect.blogspot.com/2020/05/using-mysql-enterprise-audit-filtering.html

mysql document page:- https://dev.mysql.com/doc/refman/8.0/en/audit-log-installation.html

First Check Whether Audit is running or not?

Join Peter Zaitsev, CEO at Percona, as he discusses database challenges and the concepts of open source and open core. Over the years, open source companies have tried to bring products to market and maximize their revenue streams.  To date, the most popular open source business model remains “Open Core”.  But is open core software still open source?  Or is it a freemium model designed to separate you from your money?  Not all companies follow the same processes, ethics, and rules when building and launching open source products.  Let’s talk about how the open core bait and switch works for many companies in the open source space.

Join this webinar to learn more about:

– Open Source and Open core distinction
– Free enterprise-class community versions alternatives
– Use-cases that successfully moved away from vendor lock-in

Please join Peter …

Do-it-Yourself (DIY), database migration; what other approaches are there to challenges of MySQL availability, reliability, scalability and application performance?

Continuent Tungsten enables greater application availability and performance especially across WAN, it saves tons of manual labor and headache, it’s backed by premium 24/7/365 support, and it enables all sorts of new freedom and possibilities for data infrastructure including multi-cloud, hybrid-cloud, and advanced, real-time analytics.

Tags:  MySQL High Availability Disaster Recovery continuous operations

How to Migrate Single MySQL Enterprise Server to Three Node MySQL Enterprise  InnoDB Cluster latest version 8.0.20 ?
Assume current you production work loads resembles multiple app server and all are point to single MySQL Server.  have you thought about below questions ?
1. what if , this database goes down ? this is single point of failure ? 2. what if, data loss ? 3. Scalability ? 4. Data Inconsistencies ? 5. DR?
BTW, i am using MySQL Enterprise Edition ,  more info:-  https://www.mysql.com/products/enterprise/
To address these basic questions on SLA , RPO/RTO ,  MySQL has another high availability solutions which is developed by MySQL Engg team, which has no noisy neighbors all components are tested by MySQL Engg team.
MySQL InnoDB Cluster= MySQL Server + MySQL Shell + MySQL …

Codership is pleased to announce a new Generally Available (GA) release of the multi-master Galera Cluster for MySQL 5.6 and 5.7, consisting of MySQL-wsrep 5.6.48 (release notes, download) and MySQL-wsrep 5.7.30 (release notes, download) with a new Galera Replication library 3.30 (release notes, download), implementing wsrep API version 25. This release incorporates all changes to MySQL 5.6.48 and 5.7.30 respectively, making it a MySQL High Availability solution.

A highlight of this release is that with MySQL 5.7.30, you will now have access to using the Percona audit log plugin, which will help with monitoring and logging connection and query activity that has been performed on specific servers. This implementation is provided as an alternative to the MySQL Enterprise Audit Log Plugin.

The Galera Replication library 3.30 has an enhancement to ensure that upon GCache recovery, all available space will be reclaimed in the …

In most cases, MySQL password instructions provide information on changing MySQL user passwords on the production system (e.g., reset root password without restart). It is even recommended to change passwords regularly for security reasons. But still, sometimes DBA duties on legacy systems offer surprises and you need to recover the original password for some old users.

There is no magic: as long as only hashes are stored and not the original passwords, the only way to recover the lost password is to brute force it from the known hash.

Note on Security and mysql-unsha1 Attack

Interestingly, if a hacker has access to password hash and can sniff mysql traffic, he doesn’t need to recover a plain text password from it. It doesn’t matter how strong the password and how strong the hashing …

FromDual has the pleasure to announce the release of the new version 1.2.0 of its popular Database Performance Monitor for MySQL fpmmm.

The FromDual Performance Monitor for MySQL (fpmmm) enables DBAs and System Administrators to monitor and understand what is going on inside their MySQL database instances and on the machines where the databases reside.

More detailed information you can find in the fpmmm Installation Guide.

Download

The new FromDual Performance Monitor for MySQL (fpmmm) can be downloaded from here or you can use our FromDual repositories. How to install and use …