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MySQL shell prompt vs MongoDB shell prompt
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Recently Todd Farmer shared an interesting story about the mysql command line prompt in MySQL 5.7: how it was changed to provide more context and why the change was finally reverted. This made me think that after using the command line client for MongoDB for awhile, I would love seeing a much more modern mysql shell prompt. Here are a few examples of what a modern command line client can do.

Add dynamic information to the prompt

If you use replication with MongoDB, you have probably noticed a nice feature of the prompt: it is replication …

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Musings on MySQL enhancements
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1) Update_time not accurate in information_schema.tables

Information_schema.tables has a field called update_time and in 5.6 you will notice that it is always NULL. Future versions of MySQL will fix this problem

2) Multiple instance manager

Currently creating , managing and dropping instances in MySQL requires many DBA hours. mysqld_multi is there to help you but it requires initial configuration and there are other third party utilities that could come to your rescue

It would be better to have built in utilities to help us in this regard.. For example db2 has db2icrt that creates an instance , db2ilist …

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LAMP php-gd Libraries
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Everything seemed complete after configuring my standalone MySQL instance to a LAMP installation, but last night I started playing with the image files. It turns out that I failed to install the php-gd library.

There’s very little feedback when you try to troubleshoot why you can’t read an image. In fact, the error message for reading the BLOB from MySQL was only available on the local Firefox browser:

The image "http://localhost/ConvertMySQLBlobToImage.php" cannot be displayed because it …
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Command line prompt
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The mysql> command-line prompt is iconic, shown in countless documentation pages, forum posts, tutorials and manuals. It’s immediately identifiable – one look, and you immediately know the context in which commands are being executed. So it’s only with good reason that we would consider changing the prompt value to something else, and Daniël van Eeden provided a compelling suggestion to modify this to provide user, host and database context. Because the mysql prompt is user-configurable, this is easy to do dynamically: …

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Analyst for MySQL v1.1: Database Performance, Security, & Best Practices Auditing Tool Released – Download for FREE!
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Itchy Ninja Software is pleased to announce the release of Analyst for MySQL v1.1. Revolutionize the way you work and administrate MySQL, MariaDB, Galera, and Percona XtraDB installations.

Make More Efficient Use of Your Time

Gathering all of the metrics to diagnose a database installation is a very time consuming process, and many simply do not have the experience to know where to begin. With Analyst for MySQL, you will be able to get your hands on hundreds of metrics within moments. It really takes all of the guesswork, as well as tedious long sessions of …

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OurSQL Episode 206: Pieces of Fabric
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PodcastsPerformanceServer Tuning

In this episode we discuss sharding and high availability with MySQL Fabric, including installation and configuration. Ear Candy is rolling out GTIDs with no restarting, and At the Movies is putting MySQL Fabric to use, including a live demo.

Using gdb to understand what locks (and when) are really set by InnoDB. Part I.
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There is a story behind this post. To make it short, the detailed study presented here started when I noted old Bug #72748 in "No feedback" status few days ago. I considered this status totally wrong and started a discussion on Facebook about it (yes, this is what I usually do, I discuss handling of MySQL bugs in public).

The technical topic of this discussion (blaming aside) was the way AUTO-INC locks are set by InnoDB with default innodb_autoinc_lock_mode=1. …

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MySQL Parallel Replication and Slave Group Commit
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http://blog.booking.com/evaluating_mysql_parallel_replication_2-slave_group_commit.html

Follow the link above to read my latest article on the Booking.com developer blog.  It is about MySQL Parallel Replication and a very nice side effect of the MariaDB implementation: …

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Scaling Backend Systems at VividCortex
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I wrote a guest post for High Scalability about how we scale our backend systems at VividCortex. It’s heavy on MySQL, sprinkled with a little bit of Redis’s magic pixie dust, and Kafka is also a key part of the architecture.

Important takeaways:

  • Our workload is unusual in that some use cases require reading huge amounts of data with interactive response times. We have lots of time-series data, but not a typical time-series workload.
  • Our data distribution is also weird.
  • Read optimization …
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Log Buffer #416, A Carnival of the Vanities for DBAs
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This log buffer edition sprouts from the beauty, glamour and intelligence of various blog posts from Oracle, SQL Server, and MySQL.

Oracle:

Oracle Exadata Performance: Latest Improvements and Less Known Features

Exadata Storage Index Min/Max Optimization

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Showing entries 1 to 10 of 34216 10 Older Entries

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