The latest from the MySQL community

This Log Buffer Edition covers some of the hottest blog posts of Oracle, SQL Server and MySQL for the previous week.

Oracle:

A recent post on the OTN database forum reminded Jonathan how easy it is to forget to keep repeating a piece of information after the first couple of hundred times you’ve explained it. No matter how “intuitively obvious” it is for one person, it’s new to someone else.

The OMS Patcher is a newer patching mechanism for the OMS specifically.

A SQLT report has all kinds of pertinent information including—to name …

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We’re excited to be presenting the latest version of ClusterControl, the one-stop console for your entire database infrastructure, during our next live webinar on May 24th. We’ll be introducing some cool new features for MySQL and MongoDB users in particular as well as walk you through the work we’ve recently done for improved security.

Date, Time & Registration Europe/MEA/APAC

Tuesday, May 24th at 09:00 BST / 10:00 CEST (Germany, France, Sweden)
Register Now

North America/LatAm

Tuesday, May 24th at 09:00 Pacific Time (US) / 12:00 Eastern Time (US)
Register Now

Our colleagues Johan Andersson (CTO), Vinay Joosery (CEO) and Ashraf Sharif (System Support Engineer) will be demonstrating …

In this post, we’ll discuss how you can quick start MySQL testing using Docker, specifically in a Mac environment.

Like a lot of people, I’m hearing a lot about Docker and it’s got me curious. The Docker ecosystem seems to be moving quickly, however, and simple “getting started” or “how-to” type articles that are easy to find for well-established technologies seem to be out-of-date or non-existent for Docker. I’ve been playing with Docker on Mac for a bit, but it is definitely a second-class citizen in the Docker world. However, I saw Giuseppe’s blog on the new Docker beta for Mac and decided to try it for myself. These steps work for the beta version on a Mac (and probably Windows), but they should work with …

How useful is a benchmark that doesn’t stress the optimizer?

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In this blog post, we’ll discuss how the Query Rewrite plugin can harm performance.

MySQL 5.7 comes with Query Rewrite plugin, which allows you to modify queries coming to the server. (You can view the details here: https://dev.mysql.com/doc/refman/5.7/en/rewriter-query-rewrite-plugin.html.)

It is based on the audit plugin API, and unfortunately it suffers from serious scalability issues (which seems to be the case for all API-based audit plugins).

I want to share the results for sysbench OLTP RO with and without the query rewrite plugin — but with one very simple rewrite rule, which doesn’t affect any queries. This is the rule from the documentation:

INSERT INTO query_rewrite.rewrite_rules (pattern, replacement)
    -> VALUES('SELECT ?', 'SELECT ? + 1');

There are results for both …

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