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. Continue reading Sizing Aria Pagecache
Category Archives: MariaDB
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. Continue reading 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. Continue reading 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. Continue reading 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. Continue reading 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. Continue reading 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. Continue reading MySQL/MariaDB: use SQL properly to run less queries
The risks of MySQL release policy
MySQL 8.0 and 5.7 follow a new release policy that exposes users to important risks. They broke compatibility with Xtrabackup (again). Continue reading The risks of MySQL release policy
READ ONLY transactions in MariaDB and MySQL
Transactions can be read only. This article explains what read only transactions are and why we should use them when appropriate. Continue reading READ ONLY transactions in MariaDB and MySQL
Using CONNECT to access remote MariaDB or MySQL tables
This article discusses how to access data from a remote table using the CONNECT storage engine, in MariaDB. Continue reading Using CONNECT to access remote MariaDB or MySQL tables