In this blog post, we’ll look at how you can verify query performance using ProxySQL.

In the previous blog post, I showed you how many information can you get from the “stats.stats_mysql_query_digest” table in ProxySQL. I also mentioned you could even collect and graph these metrics. I will show you this is not just theory, it is possible.

These graphs could be very useful to understand the impact of the changes what you made on the query count or execution time.

I used our all-time favorite benchmark tool called Sysbench. I was running the following query:

UPDATE sbtest1 SET c=? WHERE k=?

There was no index on “k” when I started the test. During the test, I …

This is our second blog in the ProxySQL Series ( Blog I MySQL Replication Read-write Split up ). Will cover how to integrate ProxySQL with MHA to handle failover of Database servers.

We already have Master – Slave replication setup behind ProxySQL from previous blog [ProxySQL On MySQL Replication]

For this setup we have added one more node for MHA Manager , Which will keep eye on Master and Slave status.

• node5 (172.17.0.5) , MHA Manager

ProxySQL can be greatly configured with MHA for …

Did you see Percona at SCaLE 16x? I spent a couple of days there learning about open source software, databases, and other interesting topics. You can get even more open source database information at Percona Live 2018.

SCaLE is the largest community-run open-source and free software conference in North America. It is held annually in the greater Los Angeles area. This year’s event took place on March 8-11, 2018, at the Pasadena Convention Center. SCaLE 16X hosted 150 exhibitors this year, along with nearly 130 sessions, tutorials and special events.

Percona has been attending now for a number of years, and this year was no exception. Besides our booth in the Exhibit Hall, we had two …

In this blog post, we’ll look at how to create PMM custom graphs and dashboards to track what you need to see in your database.

Percona Monitoring and Management (PMM)‘s default set of graphs is pretty complete: it covers most of the stuff a DBA requires to fully visualize database servers. However, sometimes custom information is needed in graphical form. Otherwise, you just feel your PMM deployment is a missing a graph.

Recently, a customer request came in asking for a better understanding of a specific metric: table growth, or more specifically the daily table growth (in bytes) for the last 30 days.

The graph we came up with looks like this:
. . .which …

In this blog, I will provide answers to the Q & A for the Basic Internal Troubleshooting Tools for MySQL Server webinar.

First, I want to thank everybody for attending my February 15, 2018, webinar on troubleshooting tools for MySQL. The recording and slides for the webinar are available here. Below is the list of your questions that I was unable to answer fully during the webinar.

Q: How do we prevent the schema prefix from appearing in the show create view. This is causing issue with restore on another server with a different DB. See the issue …

If you’ve been delaying nominating someone or something for a MySQL Community Award, now is the time to submit it. You can submit it quickly via a google form, or go through the trouble of tweeting or emailing it.

After March 15, the Committee will being voting.

As a reminder: there are categories for Community Contributor (a person), Application, and Corporate Contributor. This is a fantastic way to honor new and old community members for the work they do – often in their spare time, and to give thanks to the corporations that help the community.

The original post with more details is here:  …

For security reasons some context require you to setup a user account locking policy. Thus an unauthorized user is not able (anymore) to login to the MySQL server. In this 3rd article of the MySQL 5.7 Security series, we will see how to [un]lock a user account.

Today, yet another blog post about improvements in MySQL 8.0 related to Performance_Schema. Before MySQL 8.0 it was not always easy to get an example of the queries you could find in Performance_Schema when looking for statements summaries. You had to link several tables (even from sys) to achieve this goal as I explained it in this post.

Now in MySQL 8.0, we have changed the table events_statements_summary_by_digest. This table now contains 6 extra columns:

• QUANTILE_95 : stores the 95th percentile of the statement latency, in …

So first I have posted in sometime as felt I should be. I have been very busy still working with MySQL and all related forks and failed to put out blogs as I felt I should. So I will work on that.

Now That being said I recalled the other day a website I used to love because it was a common VI cheat sheet list. The syntax you know , you know you need it, but type it 3 times until it right. When it does get entered right you look at it dumbfounded , I thought I wrote that already.

So I figured why not a simple list of common MySQL commands that we all either type 50 times a month or should know like the back of our hand but forget when the client is looking over our shoulder.
For starters..
We set up a new MySQL 5.7.6+ server and log in..
Need to change password before we can do anything. But it is Alter user not Set pass.
We want to know how to read the password still as …

In this blog post, we’ll look at how to navigate some of the complexities of multi-source GTID replication.

GTID replication is often a real challenge for DBAs, especially if this has to do with multi-source GTID replication. A while back, I came across a really interesting customer environment with shards where multi-master, multi-source, multi-threaded MySQL 5.6 MIXED replication was active. This is a highly complex environment that has both pros and cons, introducing risks as a trade-off for specific customer requirements.

This is the set up of part of this environment:

I started looking into this setup when a statement broke replication between db1 and db10. Replication broke due to a statement executed on a schema that was not present on db10. This also …