in this tutorial, We ll concatenate two or multiple columns in MySQL.We will select the values and concat multiple columns using MySQL inbuilt method. It can also achieve same thing using programmatically. You need to select columns fields value separately from MySQL Table and store their values in the single variable after concat their values. […]
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Just realized I did not post any notes about dim_STAT CoreUpdates during the last 3 years, so will try to fix it now with the following short summary ;-))
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Introduction Welcome to a new issue of the High-Performance Java Persistence Newsletter in which we share articles, videos, workshops, and StackOverflow answers that are very relevant to any developer who interacts with a database system using Java. Articles From version 2.12, Percona PMM uses Victoria Metrics instead of Prometheus. Victoria Metrics provides better disk I/0 utilization and less memory usage. For more details about this change and its benefits, check out this article. By default, the MySQL JDBC Driver only emulates prepared statements. If you wonder whether server-side prepared statements perform better... Read More
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[Read more]If you run MySQL on Amazon RDS and use passwords, I sure hope you frequently rotate those passwords (among many other security best practices). But if you don’t rotate them, I might know why: it’s quite difficult to set up when you really get into it. It seems easy at first, but if you’ve ever tried you know how quickly it becomes complicated. At least, that was my experience. So to help others overcome the challenges and do frequent password rotation, I wrote up a long read: MySQL Password Rotation with AWS Secrets Manager and Lambda.
How to set up MySQL password rotation with AWS Secrets Manager, AWS Lambda, and Terraform
How to set up MySQL password rotation with AWS Secrets Manager, AWS Lambda, and Terraform
A lot of elements take part in a good backup strategy. Two of them are:
Those points relate directly to costs. Storing a backup on an off-site facility cost money. Keeping the backups available to fulfill your retention period policy costs money.
The main cloud providers have different layers of storage often called Storage Class. Each layer has its own particularities and policies, but they come with an important factor – Cost!
We are happy to announce that starting at …
[Read more]First we will talk about some of the other internal users of the technology that underpins the InnoDB Clone. MySQL Enterprise Backup (MEB) is an enterprise offering that provides backup and recovery for MySQL. Among various types of backups available, the following two types are of interest to us:
Full Backup – A backup that backs
up the entire MySQL instance – all the tables in each MySQL
database.
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MySQL 5.7, alongside other many improvements, brought bulk load for creating an index (WL#7277 to be specific), which made ADD INDEX operations much faster by disabling redo logging and making the changes directly to tablespace files. This change requires extra care for backup tools. To block DDL statements on an instance, Percona Server for MySQL implemented LOCK TABLES FOR BACKUP. Percona XtraBackup (PXB) uses this lock for the duration of the backup. This lock does not affect DML statements.
MySQL 5.7 doesn’t have an option to block an instance against DDL and to allow all MDL’s. Thus, Percona XtraBackup has also implemented –lock-ddl-per-table. Before we go into other details, let’s understand how –lock-ddl-per-table works up to now:
As mentioned in the AWS discussion forum back in October, Amazon has started the end of life (EOL) process for RDS MySQL version 5.5. What this means is:
As any seasoned administrator knows, upgrades can be painful and things might go wrong.
Risks
I think we can safely assume that the upgrade will be performed in-place, as it would be too complex and time-consuming otherwise. Since a direct upgrade from 5.5 to 5.7 is not supported, we need to go through 5.6 first. This means instances need to be restarted twice; first to go from …
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