Testing functionalities and options for a database can be challenging at times, as a live production environment might be required. As I was looking for different options, I was directed by Derek Downey to this post in the Percona blog.

The blog discussed an interesting and fun tool from Percona, tpcc-mysql. I was interested in testing the tool so I decided to play around with it in an AWS EC2 server.

In this post I will expand on the Percona blog post, since the tool lacks documentation, as well as explain how I used it to create a MySQL Benchmark in AWS.

Why tpcc-mysql?

There are various reasons why tpcc-mysql could be a good …

Too often developers and DBAs struggle to pinpoint the root cause of MySQL database performance issues, and then spend too much time in trying to fix them. Wouldn’t it be great to bypass wasted guesswork and get right to the issue?

In our upcoming webinar Tired of MySQL Making You Wait? we’re going to help you discover how to significantly increase the performance of your applications and reduce database response time.

In this webinar, Principal Architect Alexander Rubin and Database Evangelist Janis Griffin will provide the key steps needed to identify, prioritize, and improve query performance.

They will discuss the following topics:

• Wait time analytics using …

What better to do during the holiday season than to read the Log Buffer? This log buffer edition is here to add some sparkle to Oracle, MySQL and SQL Server on your days off.

Oracle:

• Ops Center version 12.3.1 has just been released. There are a number of enhancements here.
• Oracle R Enterprise (ORE) 1.5 is now available for download on all supported platforms with Oracle R Distribution 3.2.0 / R-3.2.0. ORE 1.5 introduces parallel distributed implementations of Random Forest, Singular Value Decomposition (SVD), and Principal Component Analysis (PCA) that operate on ore.frame objects.
• Create a SOA Application in JDeveloper 12c Using Maven …

Check Out Our Latest Technical Resources for MySQL, MariaDB, PostgreSQL and MongoDB

This is our last s9s Tools & Resources communication in 2015 and as we prepare to kick off 2016, we’d like to take this opportunity to thank you for your support in the year gone by and to wish you a successful start to the new year!

This is a summary of all the resources we recently published. Please do check it out and let us know if you have any comments or feedback.

Momentum Highlights Severalnines breaks records on MongoDB, MySQL & PostgreSQL

• Over 100% sales growth achieved early in first half of 2015
• 150+ enterprise customers, 8,000+ community users - thank you for joining us!
• New enterprise accounts wins such …

At Etsy, we have a nice, clean, streamlined build process. We have a command for setting up RAID, and another for OS installation. OS installation comes with automagic for LDAP, Chef roles, etc.

We came across an odd scenario today when a co-worker was building a box that gave the following error:

Traceback (most recent call first): File “/usr/lib/anaconda/storage/partitioning.py”, line 1066, in allocatePartitions disklabel = disklabels[_disk.path] File “/usr/lib/anaconda/storage/partitioning.py”, line 977, in doPartitioning allocatePartitions(storage, disks, partitions, free) File “/usr/lib/anaconda/storage/partitioning.py”, line 274, in doAutoPartition exclusiveDisks=exclusiveDisks) File “/usr/lib/anaconda/dispatch.py”, line 210, in moveStep rc = stepFunc(self.anaconda) File “/usr/lib/anaconda/dispatch.py”, line 126, in gotoNext self.moveStep() File “/usr/lib/anaconda/dispatch.py”, line 233, in …

Few days ago I came across the announcement that MaxScale 1.3 finally supports Persistent Connection.
ProxySQL supports persistent connection since it was a prototype (sometime back in 2013), therefore I am very happy that the MaxScale Team finally introduced a long waited feature.
Although, MaxScale implementation of persistent connection has a serious drawback and I would consider it as a serious bug (more details at the end of the article). A bug so serious that shouldn't reach any GA release.

Since I like running benchmark, and due the new feature in MaxScale, I thought it is a good time to compare again ProxySQL vs MaxScale, around 6 months after a previous benchmark .

Benchmark : ProxySQL vs MaxScale
Benchmark …

jjs is a JavaScript shell that ships with Oracle Java 1.8. I recently found myself in a situation where it seemed worth while to check it out, so I did. I do not want to use this post to elaborate too much on why I started looking at jjs, but I intend to write about that shortly. For now I just want to share a few observations, as well as a solution to a particular obstacle I encountered. What is jjs?Java 1.8 (both SDK and JRE) ships a new executable called …

Another post in the EXPLAIN FORMAT=JSON is Cool! series! In this post, we’ll discuss how the EXPLAIN FORMAT=JSON provides optimization details for 

ORDER BY

 and  

GROUP BY

 operations in conjunction with 

order_by_subqueries

 and  

group_by_subqueries

. 

EXPLAIN FORMAT=JSON

 can print details on how a subquery in

ORDER BY

 is optimized:

mysql> explain format=json select emp_no, concat(first_name, ' ', last_name) f2 from employees order by (select emp_no limit 1)G
*************************** 1. row ***************************
EXPLAIN: { …

One of the most common engagements I do is working with firms in and around the NYC startup sector. I evaluate AWS infrastructures & applications built in the Amazon cloud. Join 32,000 others and follow Sean Hull on twitter @hullsean. I’ve seen some patterns in customers usage of Amazon. Below is a laundry list of … Continue reading 5 core pieces of the Amazon Cloud puzzle to get your project off the ground → …

InnoDB and the Thread Sanitizer do not work well together in MySQL 5.7.  There are hundreds of possible data races reported by the Thread Sanitizer in the InnoDB code for the simplest case of initializing the MySQL server and shutting it down.  Luckily, most of these data races are benign.  The problem of finding an interesting data race in the InnoDB software is similar to finding evidence of a sub-atomic particle in a particle accelerator; many Thread Sanitizer events must be analyzed before something interesting is found.

One example of a benign data race is InnoDB's implementation of fuzzy counters.  A …