The latest from the MySQL community

Knowing your database can scale provides great peace of mind. We built PlanetScale on top of Vitess so that we could harness its ability to massively scale. One of the core strengths in our ability to scale is horizontal sharding. To demonstrate the power of horizontal sharding, we decided to run some benchmarking.

We set up a PlanetScale database and started running some benchmarks with a common tpc-c sysbench workload. We weren’t aiming for a rigorous academic benchmark here, but we wanted to use a well-known and realistic workload. We will have more benchmark posts coming and have partnered with an academic institution who will be releasing their work soon.

For this post, there are two goals. The …

Discover how PlanetScale handles one million queries per second (QPS) with horizontal sharding in MySQL

You may have read MyRocks Use Case: Big Dataset and been intrigued enough to want to evaluate RocksDB with InnoDB.  It has several advantages including requiring less storage space.

So how do you start?

On a fresh install of Percona Server for MySQL, install RocksDB by entering sudo apt install percona-server-rocksdb:

percona@DellXPS:~$ sudo apt install percona-server-rocksdb
[sudo] password for percona:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
percona-server-rocksdb
0 upgraded, 1 newly installed, 0 to remove and 32 not upgraded.
Need to get 65.3 MB of archives.
After this operation, 292 MB of additional disk space will be used.
Get:1 …

Window functions in MySQL offer developers an efficient way to view and compare data across a result set. In this post we will talk about some basic window function syntax and usage.

First introduced as part of the SQ:2003 Standard and available in MySQL 8.0, window functions in MySQL are compelling, but the syntax can also be a little intimidating when you first start using them. This post is the first in a series where we will discuss window functions – including breaking down the syntax and […]

Since 8.0.30, you have the possibility to modify the InnoDB Redo Log Capacity online. An undersized Redo Log Capacity is problematic and lead to performance issues.

However, it’s not recommended to oversize the Redo Log either. Redo Log files consume disk space and increases the recovery time in case of a restart (innodb_fast_shutdown=1) or a sudden crash. And it also slows down shutdown when innodb_fast_shutdown=0.

This means that now, you don’t need to restart MySQL if you want to increase or decrease the size of the InnoDB Redo Logs files. In fact, we don’t talk anymore about file size but about capacity ! The DBA doesn’t need to specify any file size and/or amount of files for Redo Logs anymore …

My last blog, Percona Utilities That Make Major MySQL Version Upgrades Easier, detailed the tools available from the Percona toolkit that assists us with major MySQL version upgrades. The pt-upgrade tool aids in testing application queries and generates reports on how each question performs on servers running various versions of MySQL.

MySQL Shell Upgrade Checker is a utility that helps in compatibility tests between MySQL 5.7 instances and MySQL 8.0 upgrades, which is part of the mysql-shell-utilities. The util.checkForServerUpgrade() function checks whether the MySQL 5.7 instance is ready for the MySQL 8.0 upgrade and generates a report with warnings, errors, and notices for preparing the current MySQL 5.7 setup for upgrading to MySQL 8.0.

We can run this Upgrade Checker Utility in the current MySQL 5.7 …

We have another packed issue of OpenLampTech, the newsletter for MySQL and PHP developers, this week. I’m glad to have you here. Thank you!

The Newsletter for PHP and MySQL Developers

Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.

In OpenLampTech issue #41, we are looking at articles covering:

• Is MySQL COUNT(*) slow?
• Symfony Twig UX components
• WordPress vs Drupal
• Top PHP testing tools
• And much much more…

Want Friday’s newsletter delivered to your inbox? Great!

Head over to the …

A few things we have noticed recently when it comes to Galera Manager support requests, that we feel we should address in this blog post.

First and foremost, it is a requirement that you install Galera Manager on a clean host. This means you install the base operating system and nothing else: no Nginx, no Apache, no InfluxDB, etc. The Galera Manager installer (gm-installer) will pull all the requisite packages, set SELinux to permissive during the install, etc. The next release of the gm-installer aims to be less fragile when it comes to this, and will aggressively handle installs on machines that already have software installed on it.

The other common issue is the inability to access ports, generally blocked by a firewall (gm-installer should have fixed this as long as setup is going properly), or some other reason. What gm-installer cannot fix …

 中国加密标准

中国加密标准的SM1、SM2、SM3、SM4、SM7、SM9等。 借助国际加密标准，我们可以利用来自开源的加密库, 例如，最常用和最流行的加密库之一是 OpenSSL。

本文旨在使用有 SMx（中国加密库）的“OpenSSL”库 的 BabaSSL加上 MySQL的TLS设置 来提供一个方法实现 国密的 MySQL。  BabaSSL不是唯一采用 MySQL 的中国加密标准,  来自其他的中国加密供应商/开源的/兼容的/最新的 OpenSSL 库， 也可能会会支持类似的方式来实现MySQL国密TLS加密。

测试环境（用于分享）

1.计算机资源（VM）

2. 操作系统 - 计算 机VM 配备 Oracle Linux 8

3. 通过公用 yum 的存储库安装MySQL 社区版本8.0

4. 使用 BabaSSL 8.3 [ BabaSSL 8.3.2-dev ]。 它基于 2020 年 9 月 22 日的 OpenSSL 1.1.1h 版本

介绍 …