This year I participated for the first time to the DOAG, the conference which takes place in November in Nuremberg. Here some key words about this event: Oracle and other technologies, 2000 visitors, more than 400 sessions, more than 800 abstracts sent, exhibitors…
And for me everything started when in June I decided to send an abstract for a MySQL session.

Preparation

I’ve been working on MySQL for several years. At the beginning of this year, I started testing the new 8.0 version. We live in an age where security is more important than ever, GDPR and other regulations force us to review some subjects such as privacy and data policies. MySQL put in place lots of improvements regarding security in this last version.
So my session proposal for the DOAG was the following one:

MySQL 8.0 Community – Ready for GDPR ?
One of the most topical subject today is …

As per the documentation, pt-table-checksum is a tool to perform online replication consistency checks by executing checksum queries on the master, which produces different results on replicas that are inconsistent with the master.

The master and each slave insert checksums into the percona.checksums table, and these are later compared for differences. It’s fairly obvious that the checksums need to be determined independently on each node, and so these inserts must be replicated as STATEMENT and not ROW. Otherwise, the slaves would just insert the same checksum as the master and not calculate it independently.

The tool only requires

binlog_format=STATEMENT

  for its own session. It sets this itself on the master, but will error if this isn’t already set on each slave node. The …

As you know, MySQL InnoDB Cluster is a High Availability solution for MySQL. However more and more people are trying to use it as a Disaster Recovery solution with 2 data centers. Natively, this is not yet supported. But it’s already possible to realize such setup if we agree with the following points:

•  a human interaction is required in case of Disaster Recovery which, by my own experience, is often acceptable
• a human interaction is required if the any Primary-Master acting as asynchronous slave leaves its group  (crash, network problem, …) or becomes secondary

These are not big constraints and it’s relatively easily to deal with them.

The Architecture

The situation is as follow:

• 2 data centers (one active, one inactive, only used for disaster recovery)
• 2 MySQL InnoDB Clusters (one in each DC)
• 3 members in each …

Percona announces the release of Percona Server for MySQL 5.7.23-25 on November 21, 2018 (downloads are available here and from the Percona Software Repositories). This release merges changes of MySQL 5.7.23, including all the bug fixes in it. Percona Server for MySQL 5.7.23-25 is now the current GA release in the 5.7 series. All of Percona’s software is open-source and free.

This release fixes a critical bug in a RocksDB submodule.

Bugs Fixed

• #5049: …

Percona announces the release of Percona Server for MySQL 5.5.62-38.14 on November 21, 2018 (downloads are available here and from the Percona Software Repositories). This release merges changes of MySQL 5.5.62, including all the bug fixes in it. Percona Server for MySQL 5.5.62-38.14 is now the current GA release in the 5.5 series. All of Percona’s software is open-source and free.

Note that Percona Server for MySQL 5.5.62-38.14 is the last release of the 5.5 series. This series goes EOL on December 1st, 2018.

Improvements

…

We are honored to be ranked as one of the 10 fastest growing AWS solution providers to watch in the year 2018 by The Technology Headlines.

Read about our journey, the host of benefits for our customers, our exceptional team, and future roadmap in this Amazon Special Edition.

Just a friendly reminder for another two shows where you can find MySQL team at this week. 

• Feira do Conhecimento Brazil is a unique event with more than 10.000 attendees. There will be about 200 exhibitors on 9000m2 of expo space presenting technological solutions to improve key areas for society such as health, education, cities, agriculture, water resources, renewable energies, inclusion and diversity. The show will bring together academia, business, government and community to show how science and technology can help reduce inequalities. We are happy to be part of this show with our talk and MySQL representative!

  • Place: Fortaleza, Brazil
  • Date: November 21-24, 2018
  • Approved Talk: "Innovation, Business & Technology" 
  …

Today I read the nice post of Bhuvanesh on the memory leak issue they experienced with MySQL. In fact when you read the post, you realize that MySQL was just following the parameters that were setup (the default of max_prepare_stmt_count is 16382 even on 5.6).

I’m still convinced that the problem should be resolved in the application even if the use of ProxySQL for multiplexing is great.

In MySQL 8.0, we have enabled the …

In this Checklist for Success series, we will discuss reducing unknowns when hosting in the cloud using and migrating to Amazon Aurora. These tips might also apply to other database as a service (DBaaS) offerings.

Previous blogs in the migrating to Amazon Aurora series:

• Migrating to Amazon Aurora: Reduce the Unknowns
• Migrating to Amazon Aurora: Optimize for Binary Log Replication

The whole premise of a database as a service offering is that you do not need to worry about the operating the …

Design A Highly Available MySQL Clusters With Orchestrator And ProxySQL In GCP — Part 2

In part1, we explained how we are going to approach the HA setup. Here we can see how to install and configure Orchestrator and ProxySQL, then do the failover testing.

Install and configure MySQL Replication:

We need a MySQL with 4 Read replica and the 4'th replica will have a replica for it. And we must have to use GTID replication. Because once the master failover done, the remaining replicas will start replicating from the new master. Without GTID its not possible, but as an alternate Orchestrator provides Pseudo-GTID.

VM Details: …