MariaDB Ignored Indexes
Ignored Index are a MariaDB 10.6 feature that allows us to drop an index in production reducing the risks. Continua a leggere MariaDB Ignored Indexes
Archivio di categoria: MariaDB
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. Continua a leggere 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. Continua a leggere The risks of replication filters in MariaDB and MySQL
Sizing Aria Pagecache
Aria pagecache is used to cache frequently read index blocks, reducing the accesses to disks. Let’s see how to check if its size is adequate. Continua a leggere Sizing Aria Pagecache
How to skip an Ansible task by default
Ansible can skip certain tasks by default. This can be useful when we automate databases. Let’s see how to do it and why. Continua a leggere How to skip an Ansible task by default
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. Continua a leggere Can we shrink InnoDB Buffer Pool?
Is InnoDB Buffer Pool big enough?
InnoDB buffer pool is the most important memory area to allocate. It contains the most frequently read data and index entries from InnoDB tables. Let’s see how to check if it is big enough. Continua a leggere Is InnoDB Buffer Pool big enough?
MariaDB/MySQL IS NULL conditions and indexes
It is quite common to use an equality condition and an IS NULL condition on the same columns. Unfortunately, this could make queries very slow. Continua a leggere MariaDB/MySQL IS NULL conditions and indexes
Monitoring that AUTO_INCREMENT values won’t reach the limit
AUTO_INCREMENT primary keys are useful, because they save usthe trouble to generate a unique value for every row, delegating this task to the database. But when we reach the limit we need to take some action, or we won’t be able to insert more rows. Continua a leggere Monitoring that AUTO_INCREMENT values won’t reach the limit
MySQL/MariaDB: use SQL properly to run less queries
Reducing the number of queries is important with any DBMS. There are two reasons for this: reducing the latency of applications; and reducing the workload for the database servers. Continua a leggere MySQL/MariaDB: use SQL properly to run less queries