How to set up AWS Audit Log plugin for MySQL 8 Community
Learn how to enable an audit log plugin on the Community version of MySQL 8 Server. Continue reading How to set up AWS Audit Log plugin for MySQL 8 Community
Category Archives: MySQL
3.6 millions MySQL servers accessible from the web. Hints to keep yours secure
Shadowserver has announced that they found over 3.6 million MySQL servers exposed to the web, following their Accessible MySQL Server Report. Continue reading 3.6 millions MySQL servers accessible from the web. Hints to keep yours secure
MariaDB/MySQL: Working with MD5 or other hashes
The optimal way to store a MD5 hashes in MariaDB, and how to work with them. Continue reading MariaDB/MySQL: Working with MD5 or other hashes
MariaDB: The regexp + LIKE optimisation
MariaDB supports regular expressions, but regexps won’t use indexes. Here’s a workaround that can be used in some cases. Continue reading MariaDB: The regexp + LIKE optimisation
How slow is SELECT * ?
The most widely known query optimisation rule is that developers should always avoid SELECT *. Even when all columns are needed, they should list their names, because more columns could be created in the future. But developers find this really Continue reading How slow is SELECT * ?
Identify useless queries in MariaDB/MySQL
Some queries always fail or never return rows. They should be eliminated to improve database performance. Continue reading Identify useless queries in MariaDB/MySQL
NULL comparisons in MariaDB, PostgreSQL, and SQLite
Comparisons are tricky when NULL values are involved. But some databases offer some special, handy syntax to solve the problem. Continue reading NULL comparisons in MariaDB, PostgreSQL, and SQLite
Finding Duplicate Indexes and Unused Indexes in MariaDB/MySQL
Having many indexes in our databases comes with a cost. It is good to periodically eliminate duplicate and unused indexes. Continue reading Finding Duplicate Indexes and Unused Indexes in MariaDB/MySQL
The risks of replication filters in MariaDB and MySQL
MariaDB/MySQL replication filters may be useful, but they come with some risks that Database Administrators should be aware of. Continue reading The risks of replication filters in MariaDB and MySQL
Can we shrink InnoDB Buffer Pool?
An oversized InnoDB buffer pool will consume too many resources and can be slower than necessary. Let’s see how to check if we can shrink it. Continue reading Can we shrink InnoDB Buffer Pool?