In MySQL 8.0.16 the optimizer has improved again! Comparisons of columns of numeric types with constant values are checked and folded or removed for invalid or out-of-rage values. The goal is to speed up query execution.

The PingCAP team has always been a strong supporter of Percona and the wider open source database community. As the people who work day in and day out on TiDB, an open source NewSQL database with MySQL compatibility, open source database is what gets us in the morning, and there’s no better place to share that passion than Percona Live.

At this year’s Percona Live Open Source Database Conference in Austin, Texas, we are particularly excited to bring you a full track of talks and demo on the latest development in TiDB during Day 1 of the conference.

Who would benefit from the TiDB track

The TiDB track is designed to share with developers, DBAs, and practitioners in general technical know-hows, reproducible benchmarks (no benchmark-eting), and best practices on how TiDB can solve their problems. …

A quick one in case anyone else hits the same problem as I encountered.  The documentation for authentication_ldap_sasl_log_status and  authentication_ldap_simple_log_status states these variables can be set to a value between 1 and 5 to control the types of messages logged.

If you set them and still find nothing is logged then sett log_error_verbosity to it’s maximum value of 3 and you should find the messages are output to the error log as expected.

Thats all! …

We are pleased to announce the launch of PMM 2.0.0-alpha2, Percona’s second Alpha release of our long-awaited PMM 2 project! In this release, you’ll find support for MongoDB Metrics and Query Analytics – watch for sharp edges as we expect to find a lot of bugs!  We’ve also expanded our existing support of MySQL from our first Alpha to now include MySQL Slow Log as a data source for Query Analytics, which enhances the Query Detail section to include richer query metadata.

• MongoDB Metrics – You can now launch PMM 2 against MongoDB and gather metrics and query data!
• MongoDB Query Analytics – Data source from MongoDB Profiler is here!
• MySQL Query Analytics
  • Queries source – MySQL Slow Log is here!
  • Sorting and more …

Conglomeration, Collaboration and Celebration of Database Administrators

Founders of Mydbops envisioned contributing knowledge back to the community. This vision is shaping up in its 3rd edition of the Meetup held on Saturday the 27th of April, 2019. This meetup edition had drawn a good amount of members from the Open Source Database Administrative Community, to the venue.  The core agenda was set on “High Availability concepts in ProxySQL and Maxscale”. There were also presentations in MongoDB Internals along with MySQL Orchestrator and its implementation excellence at Ola (ANI Technologies Pvt. Ltd.)

The participants from various organisations like MariaDB, TeleDNA, CTS, OLA, Infosys, …

I mentioned in my previous blog entry that had I encountered an issue with this plugin, and I think now that it has been fixed in the latest MySQL versions (released on 2019-04-25) it’s reasonable to share my findings.

The following tests are with MySQL Version 8.0.13. I start by installing the plugin, pointing it at my Windows Domain Controller and creating a user associated with the DN of my Windows account.

mysql> INSTALL PLUGIN authentication_ldap_simple SONAME 'authentication_ldap_simple.so';
Query OK, 0 rows affected (0.05 sec)

mysql> SET GLOBAL authentication_ldap_simple_server_host='win-dc.windows.domain';
Query OK, 0 rows affected (0.00 sec)

mysql> CREATE USER 'patrick'@'%'
    ->        IDENTIFIED WITH authentication_ldap_simple
    ->        BY …

With MySQL Shell 8.0.16, a new very interesting feature was released: the Reporting Framework.

Jesper already blogged about it and I recommend you to read his articles if you are interested in writing your own report:

• https://mysql.wisborg.dk/2019/04/26/mysql-shell-8-0-16-built-in-reports/
• https://mysql.wisborg.dk/2019/04/27/mysql-shell-8-0-16-user-defined-reports/

I this post, I will show you one user-defined report that can be used to monitor your MySQL InnoDB Cluster / Group Replication.

Preparation

Before being able to use the report, you need to download 2 files. The first one is the …

When users experience memory usage issues with any software, including MySQL®, their first response is to think that it’s a symptom of a memory leak. As this story will show, this is not always the case.

This story is about a bug.

All Percona Support customers are eligible for bug fixes, but their options vary. For example, Advanced+ customers are offered a HotFix build prior to the public release of software with the patch. Premium customers do not even have to use Percona software: we may port our patches to upstream for them. But for Percona products all Support levels have the right to have a fix.

Even so, this does not mean we will fix every unexpected behavior, even if we accept that behavior to be a valid bug. One of the reasons …

This is a 3 part blog series:

• Part 1: The SYSTEM_USER Dynamic Privilege
• Part 2 : Partial Revokes from Database Objects
• Part 3 : How to create multiple accounts for an app?

Have you ever encountered situations where you want to grant a user access to all databases except a few databases ? …

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This is a 3 part blog series:

• Part 1: The SYSTEM_USER Dynamic Privilege
• Part 2 : Partial Revokes from Database Objects
• Part 3 : How to create multiple accounts for an app?

To modify users, you must have the CREATE USER privilege or the UPDATE privilege on the mysql schema.…

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