Its not the new term for DBAs. MySQL has an awesome parameter innodb-file-per-tables allows MySQL to create separate files for each tables. This helped a lot to manage the disk space in more efficient way. But when we perform a large batch job for delete or update the data in MySQL tables, you may face this fragmentation issue. Comparing with SQL server, MySQL’s fragmentation is not high. I had a similar situation where my Disk space was consuming 80% and when I check the huge files in OS, one table’s idb file consumed 300GB+. I know it has some wasted blocks(but not actually wasted, MySQL will use this space, it’ll not return this to OS) Then I checked the information schema to find out the data size and its index size. It was 27GB only. Then I realize, we did a batch operation to delete many billions of records in that table.

Thanks to Rolando - MySQL DBA:

When I searched the similar …

As an intro to his performance act, an “old school” entertainer Victor Borge once famously asked the audience: “Do you care for piano music?“, which was greeted by a crowd, only to be immediately followed by a self-ironic punch line – “Too bad.”…

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Công việc lập trình là một công việc đòi hỏi người thực hiện phải có một niềm đam mê lớn và khả năng tư duy nhạy bén. Tuy nhiên với thời buổi công nghệ phát triển mạnh mẽ như hiện nay, việc một lập trình viên có đam mê và năng lực thì chưa đủ, bạn cần phải biết cũng như là sử dụng thành thạo các công cụ tiện ích để hỗ trợ bạn viết ra được những chương trình chất lượng một cách nhanh chóng cũng như là bảo mật tốt cho sản phẩm trí tuệ của mình. Trong bài viết này, chúng tôi sẽ giới thiệu đến bạn một loại công cụ rất được các công ty lập trình ưa chuộng, được sử dụng thường xuyên tại công ty Mona Media –  chính là MySQL Workbench.

1. MySQL Workbench …

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In my blog series about external contributions to MySQL 8 we have reached version 8.0.18 which was released Monday 14 October 2019. Again the community has contributed to make MySQL better. Thank you.

The contributions to MySQL 8.0.18 includes several patches from Facebook as well as patches from Gillian Gunson, Przemysław Skibiński (Percona), Daniel Black, and Satya Bodapati (also Percona). The contributions are:

• MySQL now provides more control over the use of compression to minimize the number of bytes sent over connections to the server. Previously, a given connection was either uncompressed or used the zlib compression algorithm. Now, it is also possible to use the zstd algorithm (zstd 1.3), and to …

In the process of enhancing MySQL replication with new features for our users, we also improve the internals. A lot of work goes also to modernize the codebase and make it easier to maintain and obviously extend as well.

In MySQL 8.0.18,…

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We have been working with PMM for quite a long time, we do most of the performance analysis with PMM for most of our clients. It also provides the flexibility that we have built our own custom dashboard. PMM has many advantages

• Easy to deploy (docker based)
• Flexible
• Customizable
• Query Analytics
• One-stop solution for MySQL,Mongo,ProxySQL & PostgresSQL
• Orchestrator
• Rich and Deep metrics stats

Highly recommended for any production deployments its equivalent to Enterprise-grade monitoring and graphing tool.

Recently we have been working for our client on MySQL Consulting to scale peak sale of the year. Wherein we have deployed PMM to view the performance …

Group Replication enables you to create fault-tolerant systems with redundancy by replicating the system state to a set of servers. Even if some of the servers subsequently fail, as long it is not all or a majority, the system is still available.…

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 Understand dirty reads when using ProxySQL

 Recently I had been asked to dig a bit about WHY some user where getting dirty reads when using PXC and ProxySQL. 

While the immediate answer was easy, I had taken that opportunity to dig a bit more and buildup a comparison between different HA solutions. 

 For the ones that cannot wait, the immediate answer is …drum roll, PXC is based on Galera replication, and as I am saying from VERY long time (2011), Galera replication is virtually synchronous. Given that if you are not careful you MAY hit some dirty reads, especially if configured incorrectly. 

 There is nothing really bad here, we just need to know how to handle it right. 

In any case the important thing is to understand some basic concepts. 

Two ways of seeing the world (the theory)

Once more let us talk about data-centric approach and …

MySQL 8.0.18 was just released, and it contains a brand new feature to analyze and understand how queries are executed: EXPLAIN ANALYZE.

What is it?

EXPLAIN ANALYZE is a profiling tool for your queries that will show you where MySQL spends time on your query and why.…

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Loading any large file into MySQL server using the LOAD DATA INFILE is a time consuming process , because it is single threaded and it is a single transaction too. But with modern hardwares system resource is not a bottle neck. At Mydbops we focus on improving the efficiency of process as we value performance more. MySQL introduced the parallel load data operations in its latest minor release MySQL 8.0.17 . I had the curiosity to test this feature and wanted to know, how it can improve the data loading comparing to the existing single threaded method  . Through this blog I am going to  compare the both methods .

Remember you can use the parallel data loading utility only via MySQL Shell .

Internal Work Flow :

This section describes the …