MySQL Adventures: How max_prepared_stmt_count can bring down production

We recently moved an On-Prem environment to GCP for better scalability and availability. The customer’s main database is MySQL. Due to the nature of customer’s business, it’s a highly transactional workload (one of the hot startups in APAC). To deal with the scale and meet availability requirements, we have deployed MySQL behind ProxySQL — which takes care of routing some of the resource intensive SELECTs to chosen replicas. The setup consists of:

• One Master
• Two slaves
• One Archive database server

Post migration to GCP, everything was nice and calm for a couple of weeks, until MySQL decided to start misbehaving and leading to an outage. We were able to quickly resolve and bring the system back online and what follows are lessons from this experience.

The configuration of the …

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The traditional way to monitor replication in MySQL is the SHOW SLAVE STATUS command. However as it will be shown, it has its limitations and in MySQL 5.7 and 8.0 the MySQL developers have started to implement the information as Performance Schema tables. This has several advantages including better monitoring of the replication delay in MySQL 8.0. This blog discusses why SHOW SLAVE STATUS should be replaced with the Performance Schema tables.

The Setup

The replication setup that will be used for the examples in this blog can be seen in the following figure.

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Jetzt sind auch noch die letzten MariaDB und MySQL Schulungstermine für 2019 festgelegt und veröffentlicht.

Mit unseren drei Schulungspartnern in Essen, Köln und Berlin bietet FromDual zur Zeit insgesamt 12 öffentliche Schulungen zum Thema MariaDB und MySQL an.

Es sind dies:

• 7 MariaDB/MySQL für Fortgeschrittene (Januar, April, Mai, Juni, Juli, Oktober und November)
• 1 MariaDB/MySQL für Einsteiger (Jan, diese Schulung findet sicher statt!)
• 4 …

Jetzt sind auch noch die letzten MariaDB und MySQL Schulungstermine für 2019 festgelegt und veröffentlicht.

Mit unseren drei Schulungspartnern in Essen, Köln und Berlin bietet FromDual zur Zeit insgesamt 12 öffentliche Schulungen zum Thema MariaDB und MySQL an.

Es sind dies:

• 7 MariaDB/MySQL für Fortgeschrittene (Januar, April, Mai, Juni, Juli, Oktober und November)
• 1 MariaDB/MySQL für Einsteiger (Jan, diese Schulung findet sicher statt!)
• 4 …

There are multiple way to setup replication with MySQL 8.0 and our replication offer as never been so rich: asynchronous, semi-synchronous, group replication, multi-source, … and much more options !

But if you want to setup a very quick Master-Slave environment from scratch for a quick test (you can always use dbdeployer), here are some commands to make it right the first time

Requirements

You need to have MySQL 8.0 installed and running on both servers and with the same initial data (a fresh install for example). Here we use mysql1 and mysql2. We will also use GTID as it’s much more convenient.

Servers Configuration

Let’s setup mysql1 first:

mysql1> SET PERSIST server_id=1; 
mysql1> SET …

When deciding on your backup strategy, one of the key components for Point In Time Recovery (PITR) will be the binary logs. Thankfully, the mysqlbinlog command allows you to easily take binary log backups, including those that would otherwise be encrypted on disk using encrypt_binlog=ON.

When

mysqlbinlog

  is used with

--raw --read-from-remote-server --stop-never --verify-binlog-checksum

  then it will retrieve binary logs from whichever master it is pointed to, and store …

This log buffer edition covers Cloud, Oracle and MySQL.

Cloud

Cloud Directory is a neglected serverless data store that deserves much more attention.

Many of our large enterprise customers have this worry hanging over their heads … what are they going to do about that mainframe when they migrate?

Miners Extract More Value from the Cloud When They Transform Their Cultures

7 steps to keep your …

MySQL Group Replication (GR) is a MySQL Server plugin that enables you to create elastic, highly-available, fault-tolerant replication topologies. Groups can operate in a
single-primary mode with automatic primary election, where only one server accepts updates at a time. Alternatively, groups can be deployed in multi-primary mode, where all servers can accept updates, even if they are issued concurrently.…

We are happy to announce that there will be a MySQL Day/MySQL Community Meetup hold in Oracle Buliding in Dubai on October 17th. Please find more details below:

• Date: Wednesday, October 17, 2018
• Time: 6pm 
• Address: Oracle Office Bulding #6, Dubai, Internet City 
• Meeting room: will be confirmed soon.
• Agenda: 
  • "Oracle MySQL 8 - The next big thing!" by Carsten Thalheimer the Master Principal Sales Consultant
  • Discussion & pizza
• More information & Registration

From MySQL 5.7.11, encryption is supported for InnoDB (file-per-table) tablespaces. This is called Transparent Tablespace Encryption or sometimes referred as Encryption at Rest. This blog post aims to give the internal details of InnoDB Tablespace Encryption.

Keyring Plugin : Why What How ?…