In this blog, we will provide answers to the Q & A for the TokuDB Troubleshooting webinar.

First, we want to thank everybody for attending the March 22, 2017 webinar. The recording and slides for the webinar are available here. Below is the list of your questions that we were unable to answer during the webinar:

Q: Is it possible to load specific tables or data from the backup?

A: Do you mean the backup created by TokuBackup? No, this is not possible. You have to restore the full backup to a temporary instance, then perform a logical …

Welcome to another post in the series of Percona Live featured session blogs! In these blogs, we’ll highlight some of the session speakers that will be at this year’s Percona Live conference. We’ll also discuss how these sessions can help you improve your database environment. Make sure to read to the end to get a special Percona Live 2017 registration bonus!

In this Percona Live featured session, we’ll meet Wei Hu, Staff Engineer at Alibaba. His session (along with co-presenter Dengcheng He, Senior Staff Engineer at Alibaba) is AliSQL: Breakthrough for the Future. AliSQL is a MySQL …

In MySQL 8.0 we have been working to improve our support for utf8 as we make the transition to switch it to the default character set.  For more details see our earlier posts:

• Sushi = Beer ?! An introduction of UTF8 support in MySQL 8.0
• New collations in MySQL 8.0.0

In today’s post I wanted to describe the improvements to support accent and case sensitive collations.…

Query routing is one of the core features of ProxySQL.
Read/write split is perhaps one of the most common query routing use, while the other most commonly used query routing implementation is for sharding.
In this blog post I will show some example on how to implement read/write split.

Read/write split using different ports

If you are using a proxy like HAProxy you can configure it to listen onto two ports: one as an endpoint for writes, while the second port as an endpoint for reads.
People has often asked how to configure ProxySQL using the same approach, and routing queries based on incoming port.

Here is an example on how to implement query routing based on incoming port, running the follow on ProxySQL's Admin. I will assume you already have master and slaves configured in the right hostgroups: MySQL writer in hostgroup 10, and MySQL readers in hostgroup 20. A similar approach will apply if you are …

In this blog we are going to view about a  new feature in latest release MySQL 8.0.1 for MySQL Replication . It is binlog_expire_logs_seconds.

Previously we can set the expire logs for binlogs in number of days. By using the new feature (binlog_expire_logs_seconds) we can see set the expire time into number of seconds.

The both expire_logs_days and binlog_expire_logs_seconds works when the binlog rotate happens in the server.

The ultimate usage of this feature will be used to set expire periods smaller than a day by providing another extra variable.

The new variable binlog_expire_logs_seconds, can be used in those cases where the expire period is not an integral …

Query routing is one of the core features of ProxySQL.
Read/write split is perhaps one of the most common query routing use, while the other most commonly used query routing implementation is for sharding.
In this blog post I will show some example on how to implement read/write split.

Read/write split using different ports

If you are using a proxy like HAProxy you can configure it to listen onto two ports: one as an endpoint for writes, while the second port as an endpoint for reads.
People has often asked how to configure ProxySQL using the same approach, and routing queries based on incoming port.

Here is an example on how to implement query routing based on incoming port, running the follow on ProxySQL's Admin. I will assume you already have master and slaves configured in the right hostgroups: MySQL writer in hostgroup 10, and MySQL readers in hostgroup 20. A similar approach will apply if you are …

In this post, I am going to show you how you can minimize the performance impact of ProxySQL rules by using some finesse.

Apply Test

In my previous post, we could see the effect of the rules on ProxySQL performance. As we could also see, the “apply” option does not help with 1000 tables. Are we sure about this? Let’s consider: if we know 90% of our traffic won’t match any rules, it doesn’t matter if we have 10 or 500 rules – it has to check all of them. And this is going to have a serious effect on performance. How can we avoid that?

Let’s insert rule number ONE, which matches all queries, like this:

insert into mysql_query_rules (username,destination_hostgroup,active,retries,match_digest,apply) values('testuser_rw',600,1,3,'(from|into|update|into table) …

The MySQL Development Team is happy to announce the first GA release of InnoDB Cluster–our integrated, native, full stack HA solution for MySQL. You can see highlights of the changes and improvements made since the RC release here, and you can download the GA packages from our MySQL APT (Ubuntu, Debian) and YUM (Redhat, OEL, Fedora) repositories or from dev.mysql.com.…

We carefully listened to the feedback we got from the last release candidate and incorporated some of the suggested changes. On top of that, we have fixed several bugs to reach the desired maturity state.

Here are the highlights of this release!…

MySQL 8.0.1 introduces two new features which allow you to better manage situations where you have tables with hot row contention.  This issue frequently presents itself in scenarios such as worker threads all accessing the same tables trying to find new work, and ecommerce websites trying to keep accurate inventory counts.…