Have a nice MySQL Season Holidays
I wish you all the best for this end of 2018 and of course a nice start of 2019’s edition ! For the best possible start of 2019, I already invite you to these different events where I will have…
Group Replication: A member in “RECOVERING” state is part of the primary partition
If you are using MySQL InnoDB Cluster (Group Replication) with ProxySQL, you should be familiar with the 2 functions and 1 view required in SYS Schema that ProxySQL uses to see if a node is online, partitioned or not, and…
MySQL Binary Log as a Transaction Coordinator
I had the pleasure to receive a nice educative video from my colleague Narendra Singh Chauhan, working in the QA team for MySQL Replication. If you are curious to understand how all this works, please take a look at the…
pre-FOSDEM MySQL Day 2019
For the third year in a row, we will take advantage of the mass presence of our MySQL Engineers during FOSDEM to organize the pre-FOSDEM MySQL Day. The program of this 3rd edition is already on track, thank you to…
MySQL Memory Consumption and Open Prepare Statements
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…
MySQL: when will the password of my users expire ?
Has you may already know, in MySQL it is possible to set an expiration period for passwords. It’s not always obvious to see when the password will expire. And most of the time if you don’t pay much attention you…
Innotop for MySQL 8.0
Recently, I did some maintenance on Innotop and I merged several pull requests including one to support MySQL 8.0 (thank you yoku0825 for the contribution). As you know, Innotop is written in Perl and to be able to use it…
Deploy an Asynchronous Replication setup with MySQL 8.0 in 2 mins
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-Replics…
MySQL and Memory: a love story (part 2)
We saw in the previous post that MySQL likes memory. We also saw how to perform operating system checks and some configuration changes for Swap and NUMA. Today, we will check what MySQL server can tell us about its memory…
MySQL and Memory: a love story (part 1)
As you may know, sometimes MySQL can be memory-hungry. Of course having data in memory is always better than disk… RAM is still much faster than any SSD disk. This is the reason why we recommended to have the working…
sysbench for MySQL 8.0
Alexey made this amazing tool that the majority of MySQL DBAs are using, but if you use sysbench provided with your GNU/Linux distribution or its repository on packagecloud.io you won’t be able to use it with the new default authentication…
MySQL: size of your tables – tricks and tips
Many of you already know how to retrieve the size of your dataset, schemas and tables in MySQL. To summarize, below are the different queries you can run: Dataset Size I the past I was using something like this :…
