Tag - Storage Engine

Using Referential Constraints with Partitioned Tables in InnoDB

partioned tables innodb

One of our support customers approached us with the following problem the other day:

Shell

mysql> CREATE TABLE child_table (
`id` int unsigned auto_increment,
`column1` varchar(64) NOT NULL,
parent_id int unsigned NOT NULL,
PRIMARY KEY (`id`),
CONSTRAINT FOREIGN KEY (parent_id) REFERENCES parent_table (id));
ERROR 1215 (HY000): Cannot add foreign key constraint

1234567

mysql> CREATE TABLE child_table (`id` int unsigned auto_increment,`column1` varchar(64) NOT NULL,parent_id int […]

Read more

Contention in MySQL InnoDB: Useful Info From the Semaphores Section

Contention in MySQL InnoDB

In a high concurrency world, where more and more users->connections->threads are used, contention is a given. But how do we identify the contention point easily?
Different approaches had been discussed previously, like the one using SHOW ENGINE INNODB STATUS command output.
SEMAPHORES
The SEMAPHORES section displays all the metrics related to InnoDB mechanics on waits. This section […]

Read more

Experimental Build of MyRocks with Percona Server for MySQL

MyRocks with Percona Server for MySQL

We have been working on bringing out a build of MyRocks with Percona Server for MySQL.
MyRocks is a RocksDB-based storage engine. You can find more information about MyRocks here.
While there is still a lot of work to do, I want to share an experimental build of Percona Server for MySQL with MyRocks, which you […]

Read more

New MariaDB Dashboard in Percona Monitoring and Management Metrics Monitor

MariaDB

In honor of the upcoming MariaDB M17 conference in New York City on April 11-12, we have enhanced Percona Monitoring and Management (PMM) Metrics Monitor with a new MariaDB Dashboard and multiple new graphs!
The Percona Monitoring and Management MariaDB Dashboard builds on the efforts of the MariaDB development team to instrument the Aria Storage Engine Status Variables related […]

Read more

Migrating MongoDB Away from MMAPv1

MMAPv1

This is another post in the series of blogs on the Percona Server for MongoDB 3.4 bundle release. In this blog post, we’ll discuss moving away from the MMAPv1 storage engine.
Introduction
WIth the MongoDB v3.0 release in February of 2015, the long-awaited ability to choose storage engines became a reality. As of version 3.0, you […]

Read more