The MySQL Ecosystem has been using InnoDB as the default transactional engine for many years now. If you are one of the few still using MyISAM, it is time you also converted and benefited from InnoDB.

If you plan to upgrade to MySQL 8.0, you have several options to deal with those MyISAM tables.

Please note that you should not use MyISAM tables. MyISAM is not ACID compliant and can lead to data loss. Also MyISAM only supports full table lock and no row locking.

As you may recall, in 5.7, MyISAM has MYD, MYI, FRM files. In 8.0, the FRM is replaced with SDI (Serialized Dictionnary Information).  Lets review multiple ways to migrate those MyISAM tables to 8.0:

Migration Options

There are multiple solutions to migrate the MyISAM data to 8.0:

1. In-place upgrade (just …

Locking is an important concept in databases. They help regulate access to the data, so your SELECT queries return consistent results and DML and DDL statements leave the data and schema in a consistent state. For the data, there are four different transaction isolation levels that influence which locks are taken. The most two commonly used isolation levels are REPEATABLE READ (the default in InnoDB) and READ COMMITTED (the default in some other databases). Both of those are said to provide non-locking reads, but there is a little more to it than that.

Selecting into a user variable causing a lock wait timeout.

One case where reads are always locking is when you explicitly requests locks by adding the FOR SHARE or FOR UPDATE modifiers. However there are also cases where SELECT statements becomes locking due to the way the result of the statement is used. …

There is a number of powerful MySQL storage engines at our disposal, and InnoDB is undoubtedly one of the most popular ones. It is highly reliable and efficient, so it is no wonder that it has become a default storage engine for all MySQL versions from 5.5 on. Let us take a look at its […]

The post What Is InnoDB in MySQL? Tutorial with Examples and Performance Tuning Tips appeared first on Devart Blog.

Startups SnapVision, GridMarkets, SnapperFutureTech, CAST.AI, and Aptivio scale faster with a multicloud strategy that includes Oracle Cloud Infrastructure

Startups SnapVision, GridMarkets, SnapperFutureTech, CAST.AI, and Aptivio scale faster with a multicloud strategy that includes Oracle Cloud Infrastructure

In a prior blog, we announced that Oracle had set a new goal to power Oracle Cloud with 100% renewable energy by 2025 to secure the energy required for our data centers’ ongoing operation. Today, Oracle has expanded its commitment to sustainability by pledging to power our global operations, both ou...

In a prior blog, we announced that Oracle had set a new goal to power Oracle Cloud with 100% renewable energy by 2025 to secure the energy required for our data centers’ ongoing operation. Today, Oracle has expanded its commitment to sustainability by pledging to power our global operations, both ou...

MySQL Shell is the popular tool to work with MySQL and it integrates perfectly everything for MySQL Database Service (MDS) in Oracle Cloud Infrastructure (OCI).

For any logical dump and load of data and especially to dump data to MDS, MySQL Shell Utility is the recommended solution.

MySQL Shell Dump & Load is faster, is parallel and compatible with OCI (block storage, MDS grants, automatic primary key creations, ...)

This post is about compression.

By default, MySQL Shell Dump uses zstd compression.

Zstd, short for Zstandard, is a fast lossless compression algorithm, targeting real-time compression scenarios at zlib-level compression ratio.

It's possible to specify the compression algorithm to use for MySQL Shell Dump Utility with the compression option.

The accepted …

MySQL Shell is the popular tool to work with MySQL and it integrates perfectly everything for MySQL Database Service (MDS) in Oracle Cloud Infrastructure (OCI). For any logical dump and load of data and especially to dump data to MDS, MySQL Shell Utility is the recommended solution. MySQL Shell Dump...

On July 20th, 2021, we’ve celebrated the release of MySQL NDB Cluster 8.0.26. MySQL NDB Cluster (or NDB for short) is part of the MySQL family of open-source products providing an in-memory, distributed, shared-nothing, high-availability storage engine usable on its own or with MySQL servers as front-ends. For the complete changeset see release notes. Download it here.

Choosing a database can be an overwhelming task, requiring to consider performance (throughput and latency), high availability, data volume, scalability, ease of use/operations, etc. These considerations are affected by where the database runs — whether that is in a cloud provider such as …